Merge pull request #460 from onflow/fix-evm-block-height-metric

`EVMHeightIndexed` metric incorrectly tracks Cadence height instead of EVM height

services/ingestion/engine.go

@@ -191,7 +191,7 @@ func (e *Engine) processEvents(events *models.CadenceEvents) error {
 		}
 	}
 
-	e.collector.EVMHeightIndexed(events.CadenceHeight())
+	e.collector.EVMHeightIndexed(events.Block().Height)
 	return nil
 }