Merge branch 'bugfix/mqtt_submodule_ref_update_v3.2' into 'release/v3.2'

mqtt: update submodule to point to latest commit (backport v3.2)

See merge request espressif/esp-idf!7288
This commit is contained in:
Angus Gratton
2020-01-22 11:29:18 +08:00