Patch Release

This release is a patch release that addresses an issue for users that have TRL installed without PEFT

What's Changed

• Release: v0.7.3 by @younesbelkada in #965
• set dev version by @younesbelkada in #966
• [core] Fix peft config typehint by @younesbelkada in #967
• Pin bnb to <=0.41.1 by @younesbelkada in #968

Full Changelog: v0.7.3...v0.7.4