fix lint

content/en/docs/concepts/signals/metrics.md

@@ -69,9 +69,9 @@ The instrument kind is one of the following:
   size).
 - **Gauge**: Measures a current value at the time it is read. An example would
   be the fuel gauge in a vehicle. Gauges are asynchronous.
-- **Asynchronous Gauge**:  Same as the **Gauge**, but is collected once for
-  each export. Could be used if you don't have access to the continuous
-  changes, but only to the aggregated value.
+- **Asynchronous Gauge**: Same as the **Gauge**, but is collected once for each
+  export. Could be used if you don't have access to the continuous changes, but
+  only to the aggregated value.
 - **Histogram**: A client-side aggregation of values, such as request latencies.
   A histogram is a good choice if you are interested in value statistics. For
   example: How many requests take fewer than 1s?