workflows/periodic-merge: replace commenting action with `gh` cli (#505151)

          github_token: ${{ steps.app-token.outputs.token }}

      - name: Comment on failure

        uses: peter-evans/create-or-update-comment@e8674b075228eee787fea43ef493e45ece1004c9 # v5.0.0

        if: ${{ failure() }}

        with:

          issue-number: 105153

          body: |

        env:

          BODY_TEXT: |

            Periodic merge from `${{ inputs.from }}` into [`${{ inputs.into }}`](https://github.com/NixOS/nixpkgs/tree/${{ inputs.into }}) has [failed](https://github.com/NixOS/nixpkgs/actions/runs/${{ github.run_id }}).

          token: ${{ steps.app-token.outputs.token }}

          GH_TOKEN: ${{ steps.app-token.outputs.token }}

        run: |

          gh pr comment 105153 --body "$BODY_TEXT"