fix: wrong app name name used in project.pbxproj

[alduzy]

Description

This PR replaces wrong app name pasted in project.pbxproj during the recent bump

Changes

Test code and steps to reproduce

Checklist

• Included code example that can be used to test this change
• Updated TS types
• Updated documentation:
  • https://github.com/software-mansion/react-native-screens/blob/main/guides/GUIDE_FOR_LIBRARY_AUTHORS.md
  • https://github.com/software-mansion/react-native-screens/blob/main/native-stack/README.md
  • https://github.com/software-mansion/react-native-screens/blob/main/src/types.tsx
  • https://github.com/software-mansion/react-native-screens/blob/main/src/native-stack/types.tsx
• Ensured that CI passes

[WoLewicki]

Did you search through the repository to see if RnDiffApp does not appear in any other places? If so, then we're good to go!