Updated submodule-xgrammar references

Irfnfnkemed · Irfnfnkemed · commit 6e37a0b6e2bb · 2025-03-20T10:37:07.000+08:00
diff --git a/3rdparty/xgrammar b/3rdparty/xgrammar
@@ -1 +1 @@
-Subproject commit d4f57c440f3da8e7330a1e5d50bba9c31f9433ea
+Subproject commit f4badadfe7363e4e09fafcde3c253a46dd5d6e97
