some more changes to action for monthly release (#894)

Signed-off-by: Allison Suarez Miranda <asuarezmiranda@lyft.com>

.github/workflows/monthly_release.yml

@@ -22,31 +22,24 @@ jobs:
         uses: actions/checkout@v2
         with:
           fetch-depth: "0"
-      - name: Create new branch
-        run: |
-          git checkout -b ${{ env.BRANCH_NAME }}
       - name: Semantic release
+        id: semantic-release
         run: |
           pip install python-semantic-release
           git config user.name github-actions
           git config user.email github-actions@github.com
-          semantic-release version -D branch=${{ env.BRANCH_NAME }}
-          semantic-release changelog
+          semantic-release version
+          echo ::set-output name=version::$(semantic-release print-version --current)
+          echo ::set-output name=difflog::$(semantic-release changelog)
       - name: Create release pull request
         uses: peter-evans/create-pull-request@v3
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          commit-message: Create new release
-          title: Create new release
+          commit-message: Bumped version to ${{ steps.semantic-release.outputs.version }}
+          title: Bumped version for release ${{ steps.semantic-release.outputs.version }}
           author: github-actions <github-actions@github.com>
-          body: |
-            - Bumped version for new release of FE library.
-
-            Auto-generated by [create-pull-request][1]
-
-            [1]: https://github.com/peter-evans/create-pull-request
+          body: ${{ steps.semantic-release.outputs.difflog }}
           team-reviewers: amundsen-io/amundsen-committers
-          branch: master
-          base: ${{ env.BRANCH_NAME }}
+          branch: ${{ env.BRANCH_NAME }}
           delete-branch: true
           signoff: true