Bump sersoft-gmbh/swifty-docs-action from 1 to 3

Bumps [sersoft-gmbh/swifty-docs-action](https://github.com/sersoft-gmbh/swifty-docs-action) from 1 to 3.
- [Release notes](https://github.com/sersoft-gmbh/swifty-docs-action/releases)
- [Commits](sersoft-gmbh/swifty-docs-action@v1...v3)

---
updated-dependencies:
- dependency-name: sersoft-gmbh/swifty-docs-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/documentation.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: generate docs
-        uses: sersoft-gmbh/swifty-docs-action@v1
+        uses: sersoft-gmbh/swifty-docs-action@v3
         with:
           output: docs