Bump submodules/nlohmann_json from 9cca280 to 7c2b2ed

Bumps [submodules/nlohmann_json](https://github.com/nlohmann/json) from `9cca280` to `7c2b2ed`.
- [Release notes](https://github.com/nlohmann/json/releases)
- [Commits](nlohmann/json@9cca280...7c2b2ed)

---
updated-dependencies:
- dependency-name: submodules/nlohmann_json
  dependency-version: 7c2b2ede37f9a3f5b9983b427459b367a75127cc
  dependency-type: direct:production
...

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

Author: dependabot[bot]