Bump peter-evans/create-pull-request from 3 to 7 (#89)

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 3 to 7.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](peter-evans/create-pull-request@v3...v7)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/rustfmt.yml

@@ -18,7 +18,7 @@ jobs:
       - run: cargo +nightly fmt
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v3
+        uses: peter-evans/create-pull-request@v7
         with:
           commit-message: rustfmt
           signoff: true