doc: fix typo in hmac.paramNames default

PR-URL: #39766
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Filip Skokan <panva.ip@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

doc/api/webcrypto.md

@@ -1278,7 +1278,7 @@ added: v15.0.0
 added: v15.0.0
 -->
 
-* Type: {string} Must be `'HMAC`.
+* Type: {string} Must be `'HMAC'`.
 
 ### Class: `Pbkdf2ImportParams`
 <!-- YAML