chore(deps): update dependency build_runner to v2.4.8 (#286)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

pubspec.yaml

@@ -13,7 +13,7 @@ dependencies:
   package_info_plus: ^5.0.1
 
 dev_dependencies:
-  build_runner: 2.4.7
+  build_runner: 2.4.8
   flutter_lints: 3.0.1
   flutter_test:
     sdk: flutter