chore: fix some struct names in comment (#1370)

Signed-off-by: linchizhen <[email protected]>

std/hash/mimc/mimc_test.go

@@ -84,7 +84,7 @@ func TestMimcAll(t *testing.T) {
 
 }
 
-// stateStoreCircuit checks that SetState works as expected. The circuit, however
+// stateStoreTestCircuit checks that SetState works as expected. The circuit, however
 // does not check the correctness of the hashes returned by the MiMC function
 // as there is another test already testing this property.
 type stateStoreTestCircuit struct {