.github/workflows: replace deprecated `set-output`

      id: ismerge

      run: |

        ISMERGE=$(curl -H 'Accept: application/vnd.github.groot-preview+json' -H "authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" https://api.github.com/repos/${{ env.GITHUB_REPOSITORY }}/commits/${{ env.GITHUB_SHA }}/pulls | jq -r '.[] | select(.merge_commit_sha == "${{ env.GITHUB_SHA }}") | any')

        echo "::set-output name=ismerge::$ISMERGE"

        echo "ismerge=$ISMERGE" >> $GITHUB_OUTPUT

    # github events are eventually consistent, so wait until changes propagate to thier DB

    - run: sleep 60

      if: steps.ismerge.outputs.ismerge != 'true'

      - name: setup

        id: setup

        run: |

          echo ::set-output name=title::"terraform-providers: update $(date -u +"%Y-%m-%d")"

          echo "title=terraform-providers: update $(date -u +"%Y-%m-%d")" >> $GITHUB_OUTPUT

      - name: update terraform-providers

        run: |

          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"