deps: update dependency com.google.cloud:google-cloud-monitoring to v3.54.0 (#3439)

This PR contains the following updates:

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

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/googleapis/java-spanner).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4xMzMuMSIsInVwZGF0ZWRJblZlciI6IjM4LjEzMy4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Author: renovate-bot

samples/install-without-bom/pom.xml

@@ -24,7 +24,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <opencensus.version>0.31.1</opencensus.version>
     <trace.version>2.52.0</trace.version>
-    <cloudmonitoring.version>3.53.0</cloudmonitoring.version>
+    <cloudmonitoring.version>3.54.0</cloudmonitoring.version>
   </properties>
 
 

samples/snapshot/pom.xml

@@ -24,7 +24,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <opencensus.version>0.31.1</opencensus.version>
     <trace.version>2.52.0</trace.version>
-    <cloudmonitoring.version>3.53.0</cloudmonitoring.version>
+    <cloudmonitoring.version>3.54.0</cloudmonitoring.version>
   </properties>
 
   <dependencies>