chore(go): fix nit in go-release workflow (#1978)

Author: rishav-karanjit

.github/workflows/go-release.yml

@@ -89,5 +89,7 @@ jobs:
 
       - name: print diff between development and release directory
         run: |
+          RELEASE_DIR_NAME="${{ steps.release-dir.outputs.releaseDirName }}"
+          PROJECT_NAME="${{ github.event.inputs.project-name }}"
           DIFF_FILES=$(diff -qr $PROJECT_NAME/runtimes/go/ImplementationFromDafny-go releases/go/$RELEASE_DIR_NAME || true)
           echo $DIFF_FILES