Clarify the meaning `bpy.app.version_file`, by being more explicit in the
description of `bpy.app.version` and their differences.
### Old:
`bpy.app.version`
: The Blender version as a tuple of 3 numbers. eg. (2, 83, 1)
`bpy.app.version_file`
: The Blender version, as a tuple, last used to save a .blend file, compatible with ``bpy.data.version``. This value should be used for handling compatibility changes between Blender versions
### New:
`bpy.app.version`
: The Blender version as a tuple of 3 numbers (major, minor, micro). eg. (4, 3, 1)
`bpy.app.version_file`
: The Blender File version, as a tuple of 3 numbers (major, minor, file sub-version), that will be used to save a .blend file. The last item in this tuple indicates the file sub-version, which is different from the release micro version (the last item of the `bpy.app.version` tuple). The file sub-version can be incremented multiple times while a Blender version is under development. This value is, and should be, used for handling compatibility changes between Blender versions
Pull Request: https://projects.blender.org/blender/blender/pulls/133142
59585cf978