fix(deps): update dependency com.google.cloud:google-iam-policy to v1.6.22 (#1145)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-iam-policy](https://togithub.com/googleapis/java-eventarc) ([source](https://togithub.com/googleapis/java-iam)) | `1.6.23-SNAPSHOT` -> `1.6.23` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-iam-policy/1.6.23/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-iam-policy/1.6.23/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-iam-policy/1.6.23/compatibility-slim/1.6.23-SNAPSHOT)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-iam-policy/1.6.23/confidence-slim/1.6.23-SNAPSHOT)](https://docs.renovatebot.com/merge-confidence/) |
| [com.google.cloud:google-iam-policy](https://togithub.com/googleapis/java-eventarc) ([source](https://togithub.com/googleapis/java-iam)) | `1.6.21` -> `1.6.23` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-iam-policy/1.6.23/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-iam-policy/1.6.23/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-iam-policy/1.6.23/compatibility-slim/1.6.21)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-iam-policy/1.6.23/confidence-slim/1.6.21)](https://docs.renovatebot.com/merge-confidence/) |

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java-iam/samples/cloud-client/snippets/pom.xml

@@ -41,7 +41,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-iam-policy</artifactId>
-      <version>1.6.21</version>
+      <version>1.6.22</version>
       <scope>compile</scope>
     </dependency>
     <dependency>