deps: update googleapis/java-cloud-bom digest to 6e38599

Author: renovate-bot

.github/workflows/ci.yaml

@@ -327,7 +327,7 @@ 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@f3c611a09b556e81029d5588afe22ca6a15b0cef
+      uses: googleapis/java-cloud-bom/tests/validate-bom@6e385993deabc54dfbec6bb6f351a0fec720b9cc
       with:
         bom-path: gapic-generator-java-bom/pom.xml