readme: update for Java 22 support

Xyene · web-flow · commit 2b36e045c758 · 2024-06-02T21:16:33.000-04:00
diff --git a/README.md b/README.md
@@ -102,7 +102,7 @@ Check out [**DMOJ/judge-server**](https://github.com/DMOJ/judge-server) for more
 Supported languages include:
 * C++ 11/14/17/20 (GCC and Clang)
 * C 99/11
-* Java 8-19
+* Java 8-22
 * Python 2/3
 * PyPy 2/3
 * Pascal
