c36212bf11
Missed in 9945d511a9
The previous commit fixed files that had not yet been saved in 4.3,
however, the versioning code was not bumped which means that a user who
had a file in a version prior to 4.2 that then saved with the full
release of 4.3 would not have the corrected versioning applied for their
texture paint workspaces.
This commit re-applies similar versioning code and bumps the version
to ensure files are up to date.
Pull Request: https://projects.blender.org/blender/blender/pulls/131337