doc: add missing options for crypto sign.sign()

Fixes: #22813

PR-URL: #22824
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Richard Lau <[email protected]>

Author: mbj36

doc/api/crypto.md

@@ -1124,6 +1124,8 @@ changes:
 * `privateKey` {string | Object}
   - `key` {string}
   - `passphrase` {string}
+  - `padding` {integer}
+  - `saltLength` {integer}
 * `outputFormat` {string}
 * Returns: {Buffer | string}