content: generics-proposal: fix issue link

Change-Id: I15acbe500ee05b3b87fa1cfb7eb7316c12cd3170
Reviewed-on: https://go-review.googlesource.com/c/blog/+/283292
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/content/generics-proposal.article b/content/generics-proposal.article
index c75c3ea..0f83878 100644
--- a/content/generics-proposal.article
+++ b/content/generics-proposal.article
@@ -59,7 +59,7 @@
 
 The [language change proposal process](https://golang.org/s/proposal)
 is how we make changes to the Go language.
-We have now [started this process](https://golang.org/issue/NNNNN)
+We have now [started this process](https://golang.org/issue/43651)
 to add generics to a future version of Go.
 We invite substantive criticisms and comments, but please try to avoid
 repeating earlier comments, and please try to [avoid simple plus-one