Update README_zh.md

penglongli · web-flow · commit a05de09ce467 · 2021-07-22T11:22:55.000+08:00
diff --git a/README_zh.md b/README_zh.md
@@ -75,7 +75,7 @@ func main() {
 
 ```go
 gaugeMetric := &ginmetrics.Metric{
-    Type:        ginmetrics.Counter,
+    Type:        ginmetrics.Gauge,
     Name:        "example_gauge_metric",
     Description: "an example of gauge type metric",
     Labels:      []string{"label1"},
