Update labeler for recent changes (#130168)

'team' is going away, and 'tech debt' got renamed.

.github/labeler.yml

@@ -79,21 +79,10 @@ framework:
 platform-ios:
   - packages/flutter_tools/lib/src/ios/**/*
 
-team:
-  - '**/pubspec.yaml'
-  - '**/fix_data.yaml'
-  - '**/*.expect'
-  - '**/*test_fixes*'
-  - .github/**/*
-  - dev/**/*
-  - examples/**/*
-  - packages/flutter_goldens/**/*
-  - packages/flutter_goldens_client/**/*
-
 'customer: gallery':
   - examples/flutter_gallery/**/*
 
-tech-debt:
+'c: tech-debt':
   - '**/fix_data.yaml'
   - '**/*.expect'
   - '**/*test_fixes*'