Refactor Github Action per b/485167538

Author: benknutson-google

.github/workflows/release-please.yml

@@ -41,7 +41,8 @@ jobs:
         if: ${{ steps.release.outputs.release_created }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          STEPS_RELEASE_OUTPUTS_TAG_NAME: ${{ steps.release.outputs.tag_name }}
         run: |
           gh release upload \
-            ${{ steps.release.outputs.tag_name }} \
+            ${STEPS_RELEASE_OUTPUTS_TAG_NAME} \
             conductor-release.tar.gz