Fix macos-26 label

Author: sfodagain

.github/workflows/ci.yml

@@ -203,7 +203,7 @@ jobs:
         python .\aws-c-http\build\deps\aws-c-common\scripts\appverifier_ctest.py --build_directory .\aws-c-http\build\aws-c-http
 
   macos:
-    runs-on: macos-26-arm64
+    runs-on: macos-26
     strategy:
       fail-fast: false
     steps: