deps: update dependency com.google.api.grpc:proto-google-cloud-monitoring-v3 to v3.54.0 (#3437)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.api.grpc:proto-google-cloud-monitoring-v3](https://redirect.github.com/googleapis/google-cloud-java) | `3.53.0` -> `3.54.0` | [![age](https://developer.mend.io/api/mc/badges/age/maven/com.google.api.grpc:proto-google-cloud-monitoring-v3/3.54.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/maven/com.google.api.grpc:proto-google-cloud-monitoring-v3/3.54.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/maven/com.google.api.grpc:proto-google-cloud-monitoring-v3/3.53.0/3.54.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/maven/com.google.api.grpc:proto-google-cloud-monitoring-v3/3.53.0/3.54.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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Author: renovate-bot

google-cloud-spanner/pom.xml

@@ -270,7 +270,7 @@
     <dependency>
       <groupId>com.google.api.grpc</groupId>
       <artifactId>proto-google-cloud-monitoring-v3</artifactId>
-      <version>3.53.0</version>
+      <version>3.54.0</version>
     </dependency>
     <dependency>
       <groupId>com.google.auth</groupId>