Update onnxruntime/test/contrib_ops/matmul_2bits_test.cc

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: HectorSVC

onnxruntime/test/contrib_ops/matmul_2bits_test.cc

@@ -566,7 +566,7 @@ TEST(MatMul2BitsWebGpu, Float32_ZeroPoint_DP4A) {
   opts.output_rel_error = 0.05f;
   RunTest2Bits<float>(opts);
 
-  // M=4 (batch), N=32, K=128, block_size=32
+  // M=4 (rows), N=32, K=128, block_size=32
   opts.M = 4;
   opts.N = 32;
   opts.K = 128;