docs(readme): update reading link, remove prerelease warning

Author: olets

README.md

@@ -2,13 +2,7 @@
 
 Documentation for [Git Prompt Kit](https://github.com/olets/git-prompt-kit)
 
-Read the documentation at <https://next.git-prompt-kit.olets.dev/>.
-
-&nbsp;
-
-> This is the WIP branch for the next major version. **It may be force pushed.**
-
-&nbsp;
+Read the documentation at <https://git-prompt-kit.olets.dev/>.
 
 ## Requirements