chore: Update setup-java comment to specific version (#2562)

Signed-off-by: Ian Lewis <[email protected]>

Author: ianlewis

actions/maven/publish/action.yml

@@ -43,7 +43,7 @@ runs:
     - name: Checkout the project repository
       uses: slsa-framework/slsa-github-generator/.github/actions/secure-project-checkout@main # needed because we run javadoc and sources.
     - name: Set up Java for publishing to Maven Central Repository
-      uses: actions/setup-java@cd89f46ac9d01407894225f350157564c9c7cee2 # v3
+      uses: actions/setup-java@cd89f46ac9d01407894225f350157564c9c7cee2 # v3.12.0
       env:
         MAVEN_USERNAME: ${{ inputs.maven-username }}
         MAVEN_PASSWORD: ${{ inputs.maven-password }}