docs: fix relative URLs and regenerate with updated protoc

README.md

@@ -17,7 +17,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>5.3.0</version>
+      <version>5.5.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>

proto-google-cloud-monitoring-v3/src/main/java/com/google/monitoring/v3/Aggregation.java

@@ -820,6 +820,10 @@ public Aligner findValueByNumber(int number) {
         };
 
     public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+      if (this == UNRECOGNIZED) {
+        throw new java.lang.IllegalStateException(
+            "Can't get the descriptor of an unrecognized enum value.");
+      }
       return getDescriptor().getValues().get(ordinal());
     }
 
@@ -1312,6 +1316,10 @@ public Reducer findValueByNumber(int number) {
         };
 
     public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
+      if (this == UNRECOGNIZED) {
+        throw new java.lang.IllegalStateException(
+            "Can't get the descriptor of an unrecognized enum value.");
+      }
       return getDescriptor().getValues().get(ordinal());
     }
 
@@ -1365,6 +1373,7 @@ private Reducer(int value) {
    *
    * @return Whether the alignmentPeriod field is set.
    */
+  @java.lang.Override
   public boolean hasAlignmentPeriod() {
     return alignmentPeriod_ != null;
   }
@@ -1387,6 +1396,7 @@ public boolean hasAlignmentPeriod() {
    *
    * @return The alignmentPeriod.
    */
+  @java.lang.Override
   public com.google.protobuf.Duration getAlignmentPeriod() {
     return alignmentPeriod_ == null
         ? com.google.protobuf.Duration.getDefaultInstance()
@@ -1409,6 +1419,7 @@ public com.google.protobuf.Duration getAlignmentPeriod() {
    *
    * <code>.google.protobuf.Duration alignment_period = 1;</code>
    */
+  @java.lang.Override
   public com.google.protobuf.DurationOrBuilder getAlignmentPeriodOrBuilder() {
     return getAlignmentPeriod();
   }
@@ -1439,6 +1450,7 @@ public com.google.protobuf.DurationOrBuilder getAlignmentPeriodOrBuilder() {
    *
    * @return The enum numeric value on the wire for perSeriesAligner.
    */
+  @java.lang.Override
   public int getPerSeriesAlignerValue() {
     return perSeriesAligner_;
   }
@@ -1466,6 +1478,7 @@ public int getPerSeriesAlignerValue() {
    *
    * @return The perSeriesAligner.
    */
+  @java.lang.Override
   public com.google.monitoring.v3.Aggregation.Aligner getPerSeriesAligner() {
     @SuppressWarnings("deprecation")
     com.google.monitoring.v3.Aggregation.Aligner result =
@@ -1497,6 +1510,7 @@ public com.google.monitoring.v3.Aggregation.Aligner getPerSeriesAligner() {
    *
    * @return The enum numeric value on the wire for crossSeriesReducer.
    */
+  @java.lang.Override
   public int getCrossSeriesReducerValue() {
     return crossSeriesReducer_;
   }
@@ -1522,6 +1536,7 @@ public int getCrossSeriesReducerValue() {
    *
    * @return The crossSeriesReducer.
    */
+  @java.lang.Override
   public com.google.monitoring.v3.Aggregation.Reducer getCrossSeriesReducer() {
     @SuppressWarnings("deprecation")
     com.google.monitoring.v3.Aggregation.Reducer result =
@@ -2339,6 +2354,7 @@ public com.google.protobuf.DurationOrBuilder getAlignmentPeriodOrBuilder() {
      *
      * @return The enum numeric value on the wire for perSeriesAligner.
      */
+    @java.lang.Override
     public int getPerSeriesAlignerValue() {
       return perSeriesAligner_;
     }
@@ -2368,6 +2384,7 @@ public int getPerSeriesAlignerValue() {
      * @return This builder for chaining.
      */
     public Builder setPerSeriesAlignerValue(int value) {
+
       perSeriesAligner_ = value;
       onChanged();
       return this;
@@ -2396,6 +2413,7 @@ public Builder setPerSeriesAlignerValue(int value) {
      *
      * @return The perSeriesAligner.
      */
+    @java.lang.Override
     public com.google.monitoring.v3.Aggregation.Aligner getPerSeriesAligner() {
       @SuppressWarnings("deprecation")
       com.google.monitoring.v3.Aggregation.Aligner result =
@@ -2490,6 +2508,7 @@ public Builder clearPerSeriesAligner() {
      *
      * @return The enum numeric value on the wire for crossSeriesReducer.
      */
+    @java.lang.Override
     public int getCrossSeriesReducerValue() {
       return crossSeriesReducer_;
     }
@@ -2517,6 +2536,7 @@ public int getCrossSeriesReducerValue() {
      * @return This builder for chaining.
      */
     public Builder setCrossSeriesReducerValue(int value) {
+
       crossSeriesReducer_ = value;
       onChanged();
       return this;
@@ -2543,6 +2563,7 @@ public Builder setCrossSeriesReducerValue(int value) {
      *
      * @return The crossSeriesReducer.
      */
+    @java.lang.Override
     public com.google.monitoring.v3.Aggregation.Reducer getCrossSeriesReducer() {
       @SuppressWarnings("deprecation")
       com.google.monitoring.v3.Aggregation.Reducer result =