add credentials

.forgejo/workflows/build.yaml

@@ -16,6 +16,8 @@ jobs:
         name: Checkout repository
         shell: sh
         run: |
+          git config --global credential.helper store
+          echo "https://github:${{ secrets.GITHUB_TOKEN }}@$(echo "${{ github.server_url }}" | cut --bytes=9-)" > ~/.git-credentials
           git clone --branch ${{ github.ref_name }} ${{ github.server_url }}/${{ github.repository }} ${{ github.workspace }}
       -
         name: Authenticate with registry