deps: update googleapis/java-cloud-bom digest to c7c443f (#3579)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| googleapis/java-cloud-bom | action | digest | `03f6dcd` -> `c7c443f` |

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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@03f6dcd453a15bf785130deb2f588de715d747b7
+      uses: googleapis/java-cloud-bom/tests/validate-bom@c7c443f45b16046fa52a077194e14dcbd1c3b90e
       with:
         bom-path: gapic-generator-java-bom/pom.xml