fix comment and changelog

changelog.d/21939_log_to_metric_tags_expansion.feature.md

@@ -1,3 +1,3 @@
-The `log_to_metric` transformer now support tags expansion similar to Loki sink's labels expansion.
+The `log_to_metric` transformer tag key are now template-able which enables tags expansion.
 
 authors: titaneric

src/transforms/log_to_metric.rs

@@ -313,7 +313,7 @@ fn render_tags(
             for (k, v) in static_tags {
                 if let Some(discarded_v) = dynamic_tags.insert(k.clone(), v.clone()) {
                     warn!(
-                        "Static static overrides dynamic tag. \
+                        "Static tags overrides dynamic tags. \
                 key: {}, value: {:?}, discarded value: {:?}",
                         k, v, discarded_v
                     );