chore: release 0.121.1 (#555)

🤖 I have created a release \*beep\* \*boop\*
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### [0.121.1](https://www.github.com/googleapis/java-errorreporting/compare/v0.121.0...v0.121.1) (2021-06-09)


### Dependencies

* update dependency com.google.cloud:google-cloud-core to v1.95.1 ([#553](https://www.github.com/googleapis/java-errorreporting/issues/553)) ([2b1fbf3](https://www.github.com/googleapis/java-errorreporting/commit/2b1fbf35abb22fadf09e4cd06e9a9db9e404db8c))
* update dependency com.google.cloud:google-cloud-shared-dependencies to v1.3.0 ([#554](https://www.github.com/googleapis/java-errorreporting/issues/554)) ([96f4a40](https://www.github.com/googleapis/java-errorreporting/commit/96f4a40118e5ac8a4665a5a8534c6e03ca97abb0))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

Author: release-please[bot]

errorreporting/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-errorreporting</artifactId>
-      <version>0.121.1-beta-SNAPSHOT</version>
+      <version>0.121.1-beta</version>
     </dependency>
     <!-- {x-version-update-end} -->