Add tagMatch description

docs/sources/k6/next/javascript-api/k6-browser/metricmessage.md

@@ -20,7 +20,7 @@ Doing this helps group metrics with different URL and name tags, which are, in f
 
 | Parameter               | Type     | Description                                                                                                                                                                                                                                                                                 |
 | ----------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| tagMatch                | object   | It is required.                                                                                                                                                                                                                                                                             |
+| tagMatch                | object   | It is required. The tagMatch object and its properties that are used for matching metrics.                                                                                                                                                                                                  |
 | tagMatch.name           | string   | It is a required field and it must not be an empty string. It will replace the current metric's url and name tag values when a match is found.                                                                                                                                              |
 | tagMatch.matches        | object[] | It is a required field. It is an array of objects containing the regular expression and optional method to match against the current metric's url and name tags. It will iterate over all the objects in `matches` until a match is found, or to the end of the array if no match is found. |
 | tagMatch.matches.url    | RegExp   | It is a required field. It is used to match against the current metric url and name tags.                                                                                                                                                                                                   |