chore: fix typo in alert.proto (#239)

* docs: fix typo in alert.proto

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google/cloud/monitoring_v3/types/alert.py

@@ -251,7 +251,7 @@ class MetricThreshold(proto.Message):
                     together (such as when aggregating multiple streams on each
                     resource to a single stream for each resource or when
                     aggregating streams across all members of a group of
-                    resrouces). Multiple aggregations are applied in the order
+                    resources). Multiple aggregations are applied in the order
                     specified.
 
                     This field is similar to the one in the ```ListTimeSeries``
@@ -362,7 +362,7 @@ class MetricAbsence(proto.Message):
                     together (such as when aggregating multiple streams on each
                     resource to a single stream for each resource or when
                     aggregating streams across all members of a group of
-                    resrouces). Multiple aggregations are applied in the order
+                    resources). Multiple aggregations are applied in the order
                     specified.
 
                     This field is similar to the one in the ```ListTimeSeries``