Create github action for update the BR steps

Author: mdotb-moz

.github/workflows/firefox-ios-bitrise-steps.yml

@@ -0,0 +1,29 @@
+name: Automatic Update and Publish PR for Bitrise Steps
+on: 
+  schedule: 
+    - cron: '0 */6 * * *'
+  workflow_dispatch: {}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Modify bitrise.yml
+      run: |
+        python ./test-fixtures/update.py
+      - name: Commit and push if bitrise.yml changed
+      run: |-
+        git diff
+        git config --global user.email "[email protected]"
+        git config --global user.name "Firefox Test Engineering"
+        git diff --quiet || (git add bitrise.yml)
+      - name: Auto Update Bitrise Steps Versions
+      uses: peter-evans/create-pull-request@v6
+      with:
+        commit-message: Auto Update Bitrise Steps Versions
+        author: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
+        committer: GitHub <[email protected]>
+        title: Update Bitrise YML file with latest steps versions
+        branch: update-br-new-steps-versions
+        token: ${{ secrets.GITHUB_TOKEN }}