chore(main): release 0.122.21 (#834)

🤖 I have created a release *beep* *boop*
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### [0.122.21](googleapis/java-errorreporting@v0.122.20...v0.122.21) (2022-03-14)


### Dependencies

* update dependency com.google.cloud:google-cloud-core to v2.5.10 ([#832](googleapis/java-errorreporting#832)) ([59c96d6](googleapis/java-errorreporting@59c96d6))

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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).

errorreporting/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-errorreporting</artifactId>
-      <version>0.122.21-beta-SNAPSHOT</version>
+      <version>0.122.21-beta</version>
     </dependency>
     <!-- {x-version-update-end} -->