content: update link in gofmt.article

Change-Id: I00e21b8f8678a950424676b41e0364df2ed6b423
GitHub-Last-Rev: e9361a8494d34197529a851c0a1c91e307a13307
GitHub-Pull-Request: golang/blog#36
Reviewed-on: https://go-review.googlesource.com/c/blog/+/234778
Reviewed-by: Ian Lance Taylor <iant@golang.org>

content/gofmt.article

diff --git a/content/gofmt.article b/content/gofmt.article
index 7aa3428..75bbfb2 100644
--- a/content/gofmt.article
+++ b/content/gofmt.article
@@ -34,7 +34,7 @@
 
 	gofmt -w yourcode.go
 
-Or you can use the "[go fmt](https://golang.org/cmd/go/#hdr-Run_gofmt_on_package_sources)" command:
+Or you can use the "[go fmt](https://golang.org/cmd/go/#hdr-Gofmt__reformat__package_sources)" command:
 
 	go fmt path/to/your/package