build(deps): bump build_runner from 2.4.4 to 2.4.6 (#1272)

Bumps [build_runner](https://github.com/dart-lang/build) from 2.4.4 to 2.4.6.
- [Release notes](https://github.com/dart-lang/build/releases)
- [Commits](dart-lang/build@build_runner-v2.4.4...build_runner-v2.4.6)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pubspec.lock

@@ -158,10 +158,10 @@ packages:
     dependency: "direct dev"
     description:
       name: build_runner
-      sha256: "220ae4553e50d7c21a17c051afc7b183d28a24a420502e842f303f8e4e6edced"
+      sha256: "10c6bcdbf9d049a0b666702cf1cee4ddfdc38f02a19d35ae392863b47519848b"
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.4"
+    version: "2.4.6"
   build_runner_core:
     dependency: transitive
     description:

pubspec.yaml

@@ -144,7 +144,7 @@ dependencies:
 
 
 dev_dependencies:
-  build_runner: ^2.4.4
+  build_runner: ^2.4.6
   dart_code_metrics: ^5.7.5
   debug_info_collector:
     git: