[docs] Changing the wording on quantization versioning and support (#46858)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/46858
Test Plan: Imported from OSS
Reviewed By: dskhudia
Differential Revision: D24542598
Pulled By: z-a-f
fbshipit-source-id: 0eb7a2dcc8f8ad52954f2555cf41d5f7524cbc2c
