fix: 修正gitignore

ba9b03b0 · vipcxj · 3c289cac · ba9b03b0
--- a/.gitignore
+++ b/.gitignore
 node_modules/
 .expo/
 ios/build/
-android/.gradle
+android/.gradle/
 android/build/
 android/app/build/
 npm-debug.*
 *.iml
-.idea
+.idea/
 npm-debug.log
 yarn-error.log