Update Readme (#660)

Co-authored-by: Lianmin Zheng <lianminzheng@gmail.com>

python/sglang/srt/server_args.py

@@ -166,6 +166,15 @@ class ServerArgs:
             "--quantization",
             type=str,
             default=ServerArgs.quantization,
+            choices=[
+                "awq",
+                "fp8",
+                "gptq",
+                "marlin",
+                "gptq_marlin",
+                "squeezellm",
+                "bitsandbytes",
+            ],
             help="The quantization method.",
         )
         parser.add_argument(
@@ -243,13 +252,13 @@ class ServerArgs:
         parser.add_argument(
             "--show-time-cost",
             action="store_true",
-            help="Show time cost of custom marks",
+            help="Show time cost of custom marks.",
         )
         parser.add_argument(
             "--api-key",
             type=str,
             default=ServerArgs.api_key,
-            help="Set API key of the server",
+            help="Set API key of the server.",
         )
 
         # Data parallelism
@@ -285,17 +294,17 @@ class ServerArgs:
         parser.add_argument(
             "--disable-flashinfer",
             action="store_true",
-            help="Disable flashinfer inference kernels",
+            help="Disable flashinfer inference kernels.",
         )
         parser.add_argument(
             "--disable-radix-cache",
             action="store_true",
-            help="Disable RadixAttention",
+            help="Disable RadixAttention for prefix caching.",
         )
         parser.add_argument(
             "--disable-regex-jump-forward",
             action="store_true",
-            help="Disable regex jump-forward",
+            help="Disable regex jump-forward.",
         )
         parser.add_argument(
             "--disable-cuda-graph",