Install swift-format

Author: stephencelis

.github/workflows/format.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Select Xcode 16.2
         run: sudo xcode-select -s /Applications/Xcode_16.2.app
       - name: Upgrade swift-format
-        run: brew update && brew upgrade swift-format
+        run: brew update && brew install swift-format
       - name: Format
         run: make format
       - uses: stefanzweifel/git-auto-commit-action@v5