operator: Explain intention behind unit test assertion

Author: RafalKorepta

operator/internal/controller/redpanda/redpanda_controller_test.go

@@ -385,6 +385,8 @@ func (s *RedpandaControllerSuite) TestClusterSettings() {
 					return int(a.ConfigVersion - b.ConfigVersion)
 				}).ConfigVersion
 
+				// Only operator should change cluster configuration once. If there is any other party that changes
+				// Redpanda cluster configuration, it is unexpected and should be investigated.
 				assert.Equal(t, initialVersion+1, currVersion, "current config version should increase only by one")
 
 				assert.False(t, slices.ContainsFunc(st, func(cs rpadmin.ConfigStatus) bool {