setup user

Author: MaciejKaras

.github/workflows/create_release_branch.yml

@@ -36,7 +36,7 @@ jobs:
           # Make sure the value of GITHUB_TOKEN will not be persisted in repo's config
           persist-credentials: false
 
-      - name: Checkout repository (${{ github.event.inputs.commit_sha }})
+      - name: Checkout repository (commit SHA))
         if: ${{ github.event.inputs.commit_sha != '' }}
         uses: actions/checkout@v4
         with:
@@ -46,6 +46,18 @@ jobs:
           # Make sure the value of GITHUB_TOKEN will not be persisted in repo's config
           persist-credentials: false
 
+      - name: Get GitHub App User ID
+        id: get-user-id
+        run: echo "user-id=$(gh api "/users/${{ steps.app-token.outputs.app-slug }}[bot]" --jq .id)" >> "$GITHUB_OUTPUT"
+        env:
+          GH_TOKEN: ${{ steps.app-token.outputs.token }}
+
+      - name: Set up Git
+        id: setup-git
+        run: |
+          git config --global user.name '${{ steps.app-token.outputs.app-slug }}[bot]'
+          git config --global user.email '${{ steps.get-user-id.outputs.user-id }}+${{ steps.app-token.outputs.app-slug }}[bot]@users.noreply.github.com'
+
       - name: Check if release branch already exists
         id: check-branch
         run: |