Update release workflow to use Xcode 16.4 for Swift 6.1 support (#298)

Author: VictorB00

.github/workflows/release.yml

@@ -45,6 +45,17 @@ jobs:
         with:
           ref: main
 
+      - name: Show available Xcodes
+        run: ls /Applications
+  
+      - name: Select Xcode 16.4
+        run: sudo xcode-select -s "/Applications/Xcode_16.4.app/Contents/Developer"
+
+      - name: Confirm Xcode version
+        run: |
+          xcodebuild -version
+          swift --version
+
       - name: Validate version format
         run: |
           if ! echo "$TAG" | grep -qE '^v[0-9]+\.[0-9]+\.[0-9]+$'; then
@@ -62,11 +73,6 @@ jobs:
           fi
           echo "Tag $TAG does not exist. Proceeding..."
 
-      - name: Xcode version
-        run: |
-          xcodebuild -version
-          swift --version
-
       - name: Install sentry-cli
         run: brew install sentry-cli