chore: release 0.120.9 (#329)

🤖 I have created a release \*beep\* \*boop\* 
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### [0.120.9](https://www.github.com/googleapis/java-errorreporting/compare/v0.120.8...v0.120.9) (2020-12-02)


### Dependencies

* update dependency com.google.cloud:google-cloud-shared-dependencies to v0.16.0 ([#328](https://www.github.com/googleapis/java-errorreporting/issues/328)) ([7123fc6](https://www.github.com/googleapis/java-errorreporting/commit/7123fc6468e10d4ba3745bd1a178cf65c5a190dd))
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This PR was generated with [Release Please](https://github.com/googleapis/release-please).

errorreporting/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-errorreporting</artifactId>
-      <version>0.120.9-beta-SNAPSHOT</version>
+      <version>0.120.9-beta</version>
     </dependency>
     <!-- {x-version-update-end} -->