Fix visionOS tests

Author: bsneed

.github/workflows/swift.yml

@@ -90,7 +90,7 @@ jobs:
 
   build_and_test_visionos:
     needs: cancel_previous
-    runs-on: macos-26
+    runs-on: macos-26-xlarge
     steps:
       - uses: maxim-lobanov/setup-xcode@v1
         with:
@@ -99,7 +99,7 @@ jobs:
       - uses: webfactory/[email protected]
         with:
           ssh-private-key: ${{ secrets.SOVRAN_SSH_KEY }}
-      - run: xcodebuild -scheme Segment test -sdk xrsimulator -destination 'platform=visionOS Simulator,os=26,name=Apple Vision Pro'
+      - run: xcodebuild -scheme Segment test -destination 'platform=visionOS Simulator,name=Apple Vision Pro'
 
   build_and_test_examples:
     needs: cancel_previous