fix: update sglang version constraint in pyproject.toml for compatibility

pyproject.toml

@@ -43,7 +43,7 @@ vlm = [
     "pydantic",
 ]
 sglang = [
-    "sglang[all]>=0.4.7,<0.4.9",
+    "sglang[all]>=0.4.8,<0.4.9",
 ]
 pipeline = [
     "matplotlib>=3.10,<4",