deps: update googleapis/java-cloud-bom digest to 7752ecd (#3603)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| googleapis/java-cloud-bom | action | digest | `514a644` -> `7752ecd` |

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Author: renovate-bot

.github/workflows/ci.yaml

@@ -300,7 +300,7 @@ jobs:
       run: |
         mvn install -B -ntp -DskipTests -Dclirr.skip -Dcheckstyle.skip
     - name: Validate gapic-generator-java-bom
-      uses: googleapis/java-cloud-bom/tests/validate-bom@514a644d091434a2ca612e51a3480513902f35ed
+      uses: googleapis/java-cloud-bom/tests/validate-bom@7752ecda097a07cb0114a446502b4fb2f175a011
       with:
         bom-path: gapic-generator-java-bom/pom.xml