devel/rubygem-ipynbdiff: update to 0.4.4
Required for gitlab-ce 14.9
Changelog:
https://gitlab.com/gitlab-org/incubation-engineering/mlops/rb-ipynbdiff/-/tags
0.4.4
Further optimisations on IpynbSymbolMap
0.4.3
Fixes infinite loop condition and improves performance for parsing