doc: fix Pbkdf2Params hash attribute heading

PR-URL: #59395
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Ulises Gascón <ulisesgascongonzalez@gmail.com>

Author: panva

doc/api/webcrypto.md

@@ -1567,7 +1567,7 @@ added: v15.0.0
 added: v15.0.0
 -->
 
-#### `pbkdb2Params.hash`
+#### `pbkdf2Params.hash`
 
 <!-- YAML
 added: v15.0.0