Bump fwal/setup-swift from 2 to 3

Bumps [fwal/setup-swift](https://github.com/fwal/setup-swift) from 2 to 3.
- [Release notes](https://github.com/fwal/setup-swift/releases)
- [Commits](swift-actions/setup-swift@v2...v3)

---
updated-dependencies:
- dependency-name: fwal/setup-swift
  dependency-version: '3'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
         - uses: actions/checkout@v6
-        - uses: fwal/setup-swift@v2
+        - uses: fwal/setup-swift@v3
         - name: Echo Swift version
           run: swift --version
         - name: Check a Release build
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - uses: actions/checkout@v6
-      - uses: fwal/setup-swift@v2
+      - uses: fwal/setup-swift@v3
         with:
           swift-version: ${{ matrix.swift-version }}
       - name: Echo Swift version