WAsm SIMD versions of [I]GEMM microkernels with NR=2

PiperOrigin-RevId: 320352097
diff --git a/test/f32-igemm.yaml b/test/f32-igemm.yaml
index 75f41ba..3de1001 100644
--- a/test/f32-igemm.yaml
+++ b/test/f32-igemm.yaml
@@ -8,6 +8,8 @@
   k-block: 4
 - name: xnn_f32_igemm_ukernel_5x8__wasmsimd_splat
   k-block: 4
+- name: xnn_f32_igemm_ukernel_4x2c4__wasmsimd
+  k-block: 4
 - name: xnn_f32_igemm_ukernel_1x4__wasm
   k-block: 1
 - name: xnn_f32_igemm_ukernel_2x4__wasm