Bump nlohmann_json from 3.12.0 to 3.12.0.bcr.1 (#3912)

Bumps [nlohmann_json](https://github.com/nlohmann/json) from 3.12.0 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-patch
...

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

Author: dependabot[bot]

MODULE.bazel

@@ -12,7 +12,7 @@ bazel_dep(name = "abseil-cpp", version = "20260107.1", repo_name = "com_google_a
 bazel_dep(name = "bazel_skylib", version = "1.9.0")
 bazel_dep(name = "curl", version = "8.12.0")
 bazel_dep(name = "grpc", version = "1.78.0", repo_name = "com_github_grpc_grpc")
-bazel_dep(name = "nlohmann_json", version = "3.12.0", repo_name = "github_nlohmann_json")
+bazel_dep(name = "nlohmann_json", version = "3.12.0.bcr.1", repo_name = "github_nlohmann_json")
 bazel_dep(name = "opentelemetry-proto", version = "1.8.0", repo_name = "com_github_opentelemetry_proto")
 bazel_dep(name = "opentracing-cpp", version = "1.6.0", repo_name = "com_github_opentracing")
 bazel_dep(name = "platforms", version = "1.0.0")