Use 'latest' so that builds don't break when github publishes new runners

Author: jberkel

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     env:
       IOS_SIMULATOR: ${{ matrix.os == 'macos-15' && 'iPhone 16' || 'iPhone 16e' }}
-      IOS_VERSION: ${{ matrix.os == 'macos-15' && '18.5' || '26.1' }}
+      IOS_VERSION: ${{ matrix.os == 'macos-15' && '18.5' || 'latest' }}
     steps:
     - uses: actions/checkout@v4
     - name: "xcrun simctl list"