Add bundle config to gitignore

Author: testableapple

.gitignore

@@ -74,6 +74,7 @@ fastlane/recordings
 StreamChatCore.framework.coverage.txt
 StreamChatCoreTests.xctest.coverage.txt
 vendor/bundle/
+.bundle/
 .swiftpm
 Example/Carthage/.env
 Example/Carthage/fastlane/report.xml