Fix Xcode version to 26.0.1 in release workflow

Use Xcode 26.0.1 (the default stable version on macOS 26 runners) instead
of latest-stable to avoid selecting Xcode 26.1 RC which has missing SDK
components. This fixes the "iOS 26.1 is not installed" error during builds.

Reference: https://github.com/actions/runner-images/blob/main/images/macos/macos-26-arm64-Readme.md

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/release.yml

@@ -41,7 +41,7 @@ jobs:
           sed -i '' 's/iPhone Developer/iPhone Distribution/' Yattee.xcodeproj/project.pbxproj
       - uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: latest-stable
+          xcode-version: '26.0.1'
       - uses: maierj/fastlane-action@v3.0.0
         with:
           lane: ${{ matrix.lane }}
@@ -66,7 +66,7 @@ jobs:
           sed -i '' 's/3rd Party Mac Developer Application/Developer ID Application/' Yattee.xcodeproj/project.pbxproj
       - uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: latest-stable
+          xcode-version: '26.0.1'
       - uses: maierj/fastlane-action@v3.0.0
         with:
           lane: mac build_and_notarize