docs: clarify that prebuilt executables are only for v1.0

Update README to indicate that prebuilt binaries are available for v1.0 only.
For v2.0+, users should use Poetry or pip installation as documented in
the Installation section.

This sets proper expectations and directs users to the appropriate
installation method based on their Python version.

Author: sc0tfree

README.md

@@ -19,7 +19,7 @@ For more information on installing and using Mentalist, please **[visit the wiki
   <img src="./assets/mentalist-demo.gif" alt="Mentalist GUI Demo"/>
 </p>
 
-To get up and running quickly, download a prebuilt executable on the [releases page](https://github.com/sc0tfree/mentalist/releases).
+**Prebuilt executables** are available for [v1.0](https://github.com/sc0tfree/mentalist/releases/tag/v1.0) (Python 3.6-3.10 only). For v2.0+ with Python 3.11+ support, use Poetry or pip installation below.
 
 ## Installation