Readme: v2 supports PHP 8.4

Author: janedbal

README.md

@@ -59,4 +59,4 @@ SqlNode is an enum of all `walkXxx` methods in Doctrine's SqlWalker, so you are
 | Version | PHP Compatibility | doctrine/orm |
 |---------| ----------------- |--------------|
 | v1      | 7.2 - 8.3         | 2.x          |
-| v2      | 8.1 - 8.3         | 3.x          |
+| v2      | 8.1 - 8.4         | 3.x          |