Bump sersoft-gmbh/swifty-linux-action from 2 to 3

Bumps [sersoft-gmbh/swifty-linux-action](https://github.com/sersoft-gmbh/swifty-linux-action) from 2 to 3.
- [Release notes](https://github.com/sersoft-gmbh/swifty-linux-action/releases)
- [Commits](sersoft-gmbh/swifty-linux-action@v2...v3)

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

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

.github/workflows/swift-test.yml

@@ -36,7 +36,7 @@ jobs:
           xcode-version: ${{ matrix.xcode-version }}
       - name: Install Swift
         if: ${{ runner.os == 'Linux' }}
-        uses: sersoft-gmbh/swifty-linux-action@v2
+        uses: sersoft-gmbh/swifty-linux-action@v3
         with:
           release-version: ${{ matrix.swift-version }}
           platform: ${{ matrix.os }}