Bump build_runner from 2.4.11 to 2.4.12

Bumps [build_runner](https://github.com/dart-lang/build) from 2.4.11 to 2.4.12.
- [Release notes](https://github.com/dart-lang/build/releases)
- [Commits](dart-lang/build@build_runner-v2.4.11...build_runner-v2.4.12)

---
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

@@ -101,10 +101,10 @@ packages:
     dependency: "direct dev"
     description:
       name: build_runner
-      sha256: "644dc98a0f179b872f612d3eb627924b578897c629788e858157fa5e704ca0c7"
+      sha256: dd09dd4e2b078992f42aac7f1a622f01882a8492fef08486b27ddde929c19f04
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.11"
+    version: "2.4.12"
   build_runner_core:
     dependency: transitive
     description: