docs: Fix one “see also” link

PR-URL: #3690
Credit: @tripu
Close: #3690
Reviewed-by: @wraithgar

Author: tripu

docs/content/commands/npm-deprecate.md

@@ -76,4 +76,4 @@ password, npm will prompt on the command line for one.
 * [npm publish](/commands/npm-publish)
 * [npm registry](/using-npm/registry)
 * [npm owner](/commands/npm-owner)
-* [npm owner](/commands/npm-adduser)
+* [npm adduser](/commands/npm-adduser)