fix: Build iOS for simulator in CI to avoid codesigning

Device builds require a Development Team even with --no-codesign.
Switch to --simulator which skips codesigning entirely.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: rmi22186

.github/workflows/pull-request.yml

@@ -107,9 +107,9 @@ jobs:
       - name: Test
         working-directory: example
         run: flutter test
-      - name: Build unsigned example iOS app
+      - name: Build example iOS app for simulator
         working-directory: example
-        run: flutter build ios --no-codesign
+        run: flutter build ios --simulator
       - name: Cleanup
         if: ${{ always() }}
         working-directory: example

.github/workflows/release-from-main.yml

@@ -75,9 +75,9 @@ jobs:
       - name: Install example dependencies
         working-directory: example
         run: flutter pub get
-      - name: Build unsigned iOS app
+      - name: Build example iOS app for simulator
         working-directory: example
-        run: flutter build ios --no-codesign
+        run: flutter build ios --simulator
 
   setup-and-version:
     needs: [build-android, build-ios]