chore: regenerate README (#263)

This PR was generated using Autosynth. 🌈


<details><summary>Log from Synthtool</summary>

```
2020-10-27 23:19:22,820 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-game-servers/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-10-27 23:19:23,781 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

Full log will be available here:
https://source.cloud.google.com/results/invocations/7a6254cb-1652-4db7-a1d4-3206c3e4a9f6/targets

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.github/readme/synth.metadata/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-game-servers.git",
-        "sha": "013258bf226c74b61361daab35b553c14acc3041"
+        "sha": "d42d6eac5ac9042eb4352a29086f685c2d368738"
       }
     },
     {

README.md

@@ -17,17 +17,17 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-game-servers</artifactId>
-  <version>0.21.2</version>
+  <version>1.0.0</version>
 </dependency>
 ```
 
 If you are using Gradle, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-game-servers:0.21.2'
+compile 'com.google.cloud:google-cloud-game-servers:1.0.0'
 ```
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-game-servers" % "0.21.2"
+libraryDependencies += "com.google.cloud" % "google-cloud-game-servers" % "1.0.0"
 ```
 
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