build(deps): bump build_runner from 2.4.6 to 2.4.8

Bumps [build_runner](https://github.com/dart-lang/build) from 2.4.6 to 2.4.8.
- [Release notes](https://github.com/dart-lang/build/releases)
- [Commits](dart-lang/build@build_runner-v2.4.6...build_runner-v2.4.8)

---
updated-dependencies:
- dependency-name: build_runner
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

pubspec.lock

@@ -157,10 +157,10 @@ packages:
     dependency: "direct dev"
     description:
       name: build_runner
-      sha256: "10c6bcdbf9d049a0b666702cf1cee4ddfdc38f02a19d35ae392863b47519848b"
+      sha256: "581bacf68f89ec8792f5e5a0b2c4decd1c948e97ce659dc783688c8a88fbec21"
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.6"
+    version: "2.4.8"
   build_runner_core:
     dependency: transitive
     description:

pubspec.yaml

@@ -27,7 +27,7 @@ dependencies:
 
 dev_dependencies:
   bloc_test: ^9.1.5
-  build_runner: ^2.4.6
+  build_runner: ^2.4.8
   flame_test: ^1.12.0
   flutter_test:
     sdk: flutter