🧰 Update to run CI on Xcode 15

Author: connor-ricks

.github/workflows/pull_request_checks.yaml

@@ -14,9 +14,9 @@ jobs:
       - name: 🗄️ Checkout Code
         uses: actions/checkout@v3
       - name: 🧰 Select Xcode Version
-        run: sudo xcode-select -s "/Applications/Xcode_14.3.1.app/Contents/Developer"
+        run: sudo xcode-select -s "/Applications/Xcode_15.0.app/Contents/Developer"
       - name: 🧪 Run tests
-        run: xcodebuild test -scheme "swift-nibbles-Package" -testPlan "swift-nibbles-Package" -destination "OS=16.4,name=iPhone 14 Pro"
+        run: xcodebuild test -scheme "swift-nibbles-Package" -testPlan "swift-nibbles-Package" -destination "OS=17.0,name=iPhone 15 Pro"
       - name: 📊 Upload Coverage
         uses: codecov/codecov-action@v3
         with: