package/json-for-modern-cpp: bump to version 3.11.3
This release fixes some bugs found in the 3.11.2 release.
https://github.com/nlohmann/json/releases/tag/v3.11.3
Signed-off-by: Michael Nosthoff <buildroot@heine.tech>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>