runtime: fix typo in loadFactor comment

Fixes #38174

Change-Id: Iacdbbcd0b4586302daf082e59d833b7aa58b1a6a
GitHub-Last-Rev: f0c9681
GitHub-Pull-Request: #38191
Reviewed-on: https://go-review.googlesource.com/c/go/+/226758
Reviewed-by: Alberto Donizetti <[email protected]>

Author: maronghe

src/runtime/map.go

@@ -66,7 +66,7 @@ const (
 	bucketCnt     = 1 << bucketCntBits
 
 	// Maximum average load of a bucket that triggers growth is 6.5.
-	// Represent as loadFactorNum/loadFactDen, to allow integer math.
+	// Represent as loadFactorNum/loadFactorDen, to allow integer math.
 	loadFactorNum = 13
 	loadFactorDen = 2