Merge branch 'feature/update_cjson_submodule_v4.0' into 'release/v4.0'

cJSON: Update submodule to v1.7.15 (v4.0)

See merge request espressif/esp-idf!15077
This commit is contained in:
Mahavir Jain
2021-09-06 06:38:10 +00:00