correct typo (irrelavent -> irrelevant)

GFA2.md

@@ -228,7 +228,7 @@ and the implied adjacent objects between consecutive objects in the list where t
 orientation of the objects matters (e.g.
 the edge between two consecutive segments, the segment between two consecutive edges, etc.)
 A set can contain a reference to a path, but not vice versa, in which case the orientation
-of the objects in the path become irrelavent.
+of the objects in the path become irrelevant.
 
 Note: It was discussed whether U/O-lines with the same name could be considered to be concatenated together in the order in which they appear (see [#54](https://github.com/GFA-spec/GFA-spec/issues/54) and [#47](https://github.com/GFA-spec/GFA-spec/pull/47)). This multi-line path format was not included in the current version of this specification, but if people want to explore use of this structure, they can do so using a different single letter record code.