Bump fsfe/reuse-action from 3 to 4

Bumps [fsfe/reuse-action](https://github.com/fsfe/reuse-action) from 3 to 4.
- [Release notes](https://github.com/fsfe/reuse-action/releases)
- [Commits](fsfe/reuse-action@v3...v4)

---
updated-dependencies:
- dependency-name: fsfe/reuse-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/reuse.yml

@@ -10,4 +10,4 @@ jobs:
     - name: Check out repository
       uses: actions/checkout@v4
     - name: Run REUSE
-      uses: fsfe/reuse-action@v3
+      uses: fsfe/reuse-action@v4