build(deps): bump peter-evans/create-pull-request from 6.0.2 to 6.0.4

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 6.0.2 to 6.0.4.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v6.0.2...v6.0.4)

---
updated-dependencies:
- dependency-name: peter-evans/create-pull-request
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/pypi-dependencies.yml

@@ -41,7 +41,7 @@ jobs:
           mv pypi-dependencies.json build-aux/flatpak/pypi-dependencies.json
 
       - name: Create pull request
-        uses: peter-evans/[email protected].2
+        uses: peter-evans/[email protected].4
         with:
           author: "AdwCustomizer <[email protected]>"
           title: "meta: update PyPI dependencies for Flatpak"