Update LitGPT references in README.md #315

Job	Run time
check-docs / make-docs (html)	2m 3s
check-docs / make-docs (doctest)	1m 59s
check-docs / make-docs (linkcheck)	2m 18s
check-package / init-store	3s
check-typing / mypy	3m 5s
check-schema / schema	9s
check-package / pkg-build (ubuntu-latest)	19s
check-package / pkg-check (ubuntu-latest, 3.8)	1m 2s
check-package / pkg-check (ubuntu-latest, 3.10)	1m 14s
check-package / pkg-check (macos-latest, 3.8)	1m 55s
check-package / pkg-check (macos-latest, 3.10)	1m 52s
check-package / pkg-check (windows-latest, 3.8)	3m 14s
check-package / pkg-check (windows-latest, 3.10)	3m 26s
check-package / pkg-guardian	1s
	22m 40s

Provide feedback