Read version from file

.github/workflows/test_java.yml

@@ -109,10 +109,11 @@ jobs:
       shell: bash
       run: |
         LOCAL_MAVEN_GROUP_DIR="${HOME}/.m2/repository/com/google/protobuf"
-        VERSION=3.22.3
+        VERSION=$(grep 'Bundle-Version:' ./java/core/target/classes/META-INF/MANIFEST.MF |awk '{print $2}')
         cp bazel-bin/java/core/core_mvn-pom.xml ${LOCAL_MAVEN_GROUP_DIR}/protobuf-java/${VERSION}/protobuf-java-${VERSION}.pom
         cp bazel-bin/java/util/util_mvn-pom.xml ${LOCAL_MAVEN_GROUP_DIR}/protobuf-java-util/${VERSION}/protobuf-java-util-${VERSION}.pom
     - name: Validate Protobuf BOM
+      # TODO: Switch main branch to a version tag
       uses: googleapis/java-cloud-bom/tests/validate-bom@main
       with:
         bom-path: java/bom/pom.xml