Not a hot-fix.
In #1786 (already release in 0.19.0), we harmonized the environment variables in the HF ecosystem with the goal to propagate this harmonization to other HF libraries. In this work, we forgot to expose HF_HOME as a constant value that can be reused, especially by transformers or datasets. This release fixes this (see #1825).
Full Changelog: v0.19.1...v0.19.2