doc: fix typo in releases.md

PR-URL: https://github.com/nodejs/node/pull/21990
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>

doc/releases.md

@@ -8,7 +8,7 @@ official release builds for Node.js, hosted on <https://nodejs.org/>.
 ## Who can make a release?
 
 Release authorization is given by the Node.js TSC. Once authorized, an
-individual must be have the following:
+individual must have the following:
 
 ### 1. Jenkins Release Access