Bump build_runner from 2.4.6 to 2.4.7 (#2173)

Bumps [build_runner](https://github.com/dart-lang/build) from 2.4.6 to 2.4.7.
- [Release notes](https://github.com/dart-lang/build/releases)
- [Commits](dart-lang/build@build_runner-v2.4.6...build_runner-v2.4.7)

---
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

@@ -109,10 +109,10 @@ packages:
     dependency: "direct dev"
     description:
       name: build_runner
-      sha256: "10c6bcdbf9d049a0b666702cf1cee4ddfdc38f02a19d35ae392863b47519848b"
+      sha256: "67d591d602906ef9201caf93452495ad1812bea2074f04e25dbd7c133785821b"
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.6"
+    version: "2.4.7"
   build_runner_core:
     dependency: transitive
     description:

pubspec.yaml

@@ -83,7 +83,7 @@ dependencies:
   visibility_detector: ^0.4.0+2
 
 dev_dependencies:
-  build_runner: ^2.4.6
+  build_runner: ^2.4.7
   custom_lint: 0.5.7
   flutter_test:
     sdk: flutter