deps: update googleapis/java-cloud-bom digest to 6626f91

Author: renovate-bot

.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@a98202d674b36364d7963945095e9826bbe57833
+      uses: googleapis/java-cloud-bom/tests/validate-bom@6626f91d2ea122ba19d15e33c8a6bc21aebe5177
       with:
         bom-path: gapic-generator-java-bom/pom.xml