chore(deps): update dependency dart_style to ^3.1.8

Author: renovate[bot]

packages/neon_framework/pubspec.yaml

@@ -82,7 +82,7 @@ dev_dependencies:
     path: ../cookie_store/packages/cookie_store_conformance_tests
   crypton: ^2.2.1
   custom_lint: ^0.7.6
-  dart_style: ^3.1.0
+  dart_style: ^3.1.8
   flutter_test:
     sdk: flutter
   go_router_builder: ^3.0.0

packages/nextcloud/pubspec.yaml

@@ -35,7 +35,7 @@ dev_dependencies:
   built_value_generator: ^8.10.1
   built_value_test: ^8.10.1
   code_builder: ^4.11.1
-  dart_style: ^3.1.0
+  dart_style: ^3.1.8
   dynamite: ^0.5.0+1
   glob: ^2.1.3
   http_client_conformance_tests: