test(ios): pin xcode version until runners have simulators defined

xcode-latest is now 26.1 but there are zero simulators defined for it
in the macos hosted runner image, so use 26.0.1 for now

Author: mikehardy

.github/workflows/tests_e2e_ios.yml

@@ -128,7 +128,7 @@ jobs:
 
       - uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: 'latest-stable'
+          xcode-version: '26.0.1' # temporarily pinning version until simulators are defined 'latest-stable'
 
       - uses: actions/checkout@v4
         with: