Bump nlohmann_json from 3.11.3 to 3.12.0.bcr.1

Bumps [nlohmann_json](https://github.com/nlohmann/json) from 3.11.3 to 3.12.0.bcr.1.
- [Release notes](https://github.com/nlohmann/json/releases)
- [Changelog](https://github.com/nlohmann/json/blob/develop/ChangeLog.md)
- [Commits](https://github.com/nlohmann/json/commits)

---
updated-dependencies:
- dependency-name: nlohmann_json
  dependency-version: 3.12.0.bcr.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

MODULE.bazel

@@ -24,7 +24,7 @@ bazel_dep(name = "rules_python", version = "1.9.0")
 bazel_dep(name = "rules_shell", version = "0.7.1")
 bazel_dep(name = "bazel_skylib", version = "1.9.0")
 bazel_dep(name = "abseil-cpp", version = "20260107.1", repo_name = "absl")
-bazel_dep(name = "nlohmann_json", version = "3.11.3", repo_name = "json")
+bazel_dep(name = "nlohmann_json", version = "3.12.0.bcr.1", repo_name = "json")
 bazel_dep(name = "fmt", version = "12.1.0-codeql.1")
 bazel_dep(name = "rules_kotlin", version = "2.2.2-codeql.1")
 bazel_dep(name = "gazelle", version = "0.47.0")