[BugFix] fix CUTLASS MLA full cudagraph (#23200)

Signed-off-by: Lucas Wilkinson <lwilkins@redhat.com>
Signed-off-by: simon-mo <simon.mo@hey.com>

vllm/v1/attention/backends/mla/cutlass_mla.py

@@ -21,7 +21,7 @@ logger = init_logger(__name__)
 
 class CutlassMLAMetadataBuilder(MLACommonMetadataBuilder[MLACommonMetadata]):
     # enable full CUDA Graph support for decode-only capture
-    attn_cudagraph_support: ClassVar[
+    cudagraph_support: ClassVar[
         AttentionCGSupport] = AttentionCGSupport.UNIFORM_SINGLE_TOKEN_DECODE