doc: fix Pbkdf2Params hash attribute heading

PR-URL: #59395
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Ulises Gascón <[email protected]>

Author: panva

doc/api/webcrypto.md

@@ -1573,7 +1573,7 @@ added: v15.0.0
 added: v15.0.0
 -->
 
-#### `pbkdb2Params.hash`
+#### `pbkdf2Params.hash`
 
 <!-- YAML
 added: v15.0.0