docs: update compatibility matrix

Author: KazuCocoa

README.md

@@ -41,7 +41,7 @@ download and unarchive the source tarball (Appium-Python-Client-X.X.tar.gz).
 
 |Appium Python Client| Selenium binding| Python version |
 |----|----|----|
-|`4.5.0`+|`4.26.0`+ | 3.9+ |
+|`4.5.0` - `5.1.0`|`4.26.0` - `4.31.0` | 3.9+ |
 |`4.3.0` -  `4.4.0`|`4.26.0`+ | 3.8+ |
 |`3.0.0` - `4.2.1` |`4.12.0` - `4.25.0` | 3.8+ |
 |`2.10.0` - `2.11.1` |`4.1.0` - `4.11.2` | 3.7+ |