chore(deps): update peter-evans/create-pull-request action to v6 (#266)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/publish-mix-hex-release.yml

@@ -201,7 +201,7 @@ jobs:
       - name: "Open a Version Update PR"
         if: ${{ env.releasePrepped == 'false' }}
         id: version-update-pr
-        uses: peter-evans/create-pull-request@153407881ec5c347639a548ade7d8ad1d6740e38 # v5
+        uses: peter-evans/create-pull-request@b1ddad2c994a25fbc81a28b3ec0e368bb2021c50 # v6
         with:
           add-paths: |
             ${{ needs.config.outputs.working_directory }}/mix.exs