chore(deps): bump build_runner from 2.4.9 to 2.4.15

Bumps [build_runner](https://github.com/dart-lang/build) from 2.4.9 to 2.4.15.
- [Release notes](https://github.com/dart-lang/build/releases)
- [Commits](dart-lang/build@build_runner-v2.4.9...build_runner-v2.4.15)

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

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

Author: dependabot[bot]

pubspec.yaml

@@ -16,7 +16,7 @@ dependencies:
 
 dev_dependencies:
   analyzer: 6.11.0
-  build_runner: 2.4.9
+  build_runner: 2.4.15
   json_serializable: 6.8.0
   lints: ">=3.0.0 <5.0.0"
   test: 1.25.15