deps: update googleapis/java-cloud-bom digest to a98202d (#3097)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| googleapis/java-cloud-bom | action | digest | `ad905cc` -> `a98202d` |

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.github/workflows/ci.yaml

@@ -330,7 +330,7 @@ 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@ad905ccb7d41bd64cc519bd855dabb0523bd7fa8
+      uses: googleapis/java-cloud-bom/tests/validate-bom@a98202d674b36364d7963945095e9826bbe57833
       with:
         bom-path: gapic-generator-java-bom/pom.xml