chore(master): release 2.2.8 (#441)

🤖 I have created a release \*beep\* \*boop\* 
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### [2.2.8](https://www.github.com/googleapis/java-dlp/compare/v2.2.7...v2.2.8) (2021-02-26)


### Dependencies

* update dependency com.google.cloud:google-cloud-pubsub to v1.111.3 ([#439](https://www.github.com/googleapis/java-dlp/issues/439)) ([80909a7](https://www.github.com/googleapis/java-dlp/commit/80909a7d01995598c775b358bc34cc69720c87b1))
* update dependency com.google.cloud:google-cloud-shared-dependencies to v0.20.0 ([#440](https://www.github.com/googleapis/java-dlp/issues/440)) ([ac3bcd3](https://www.github.com/googleapis/java-dlp/commit/ac3bcd376f62cd51184accc3a2ac60981815e6ee))
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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).

dlp/snippets/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-dlp</artifactId>
-      <version>2.2.8-SNAPSHOT</version>
+      <version>2.2.8</version>
     </dependency>
     <!-- {x-version-update-end} -->