language: fix typo in update docs

Change-Id: Ied188b87f0a9a1a4fb160b2a7ba239ed70b843a6
Reviewed-on: https://go-review.googlesource.com/c/text/+/359715
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Amelia Downs <adowns@vmware.com>
Trust: Cherry Mui <cherryyz@google.com>
diff --git a/language/match.go b/language/match.go
index f734921..ee45f49 100644
--- a/language/match.go
+++ b/language/match.go
@@ -545,7 +545,7 @@
 // match as the preferred match.
 //
 // If pin is true and have and tag are a strong match, it will henceforth only
-// consider matches for this language. This corresponds to the nothing that most
+// consider matches for this language. This corresponds to the idea that most
 // users have a strong preference for the first defined language. A user can
 // still prefer a second language over a dialect of the preferred language by
 // explicitly specifying dialects, e.g. "en, nl, en-GB". In this case pin should