chore: release 0.120.22 (#489)

🤖 I have created a release \*beep\* \*boop\*
---
### [0.120.22](https://www.github.com/googleapis/java-errorreporting/compare/v0.120.21...v0.120.22) (2021-04-09)


### Dependencies

* update dependency com.google.cloud:google-cloud-shared-dependencies to v0.21.0 ([#488](https://www.github.com/googleapis/java-errorreporting/issues/488)) ([40a2119](https://www.github.com/googleapis/java-errorreporting/commit/40a2119b2e01a1dd963de75087b5e13710636dc8))
---


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>0.120.39-beta-SNAPSHOT</version>
+      <version>0.120.39-beta</version>
     </dependency>
     <!-- {x-version-update-end} -->