doc: consistent webcrypto node.keyObject format

PR-URL: #37200
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

doc/api/webcrypto.md

@@ -608,10 +608,10 @@ added: v15.0.0
 -->
 
 * `format`: {string} Must be one of `'raw'`, `'pkcs8'`, `'spki'`, `'jwk'`, or
-  `node.keyObject`.
+  `'node.keyObject'`.
 * `key`: {CryptoKey}
 * Returns: {Promise} containing {ArrayBuffer}, or, if `format` is
-  `node.keyObject`, a {KeyObject}.
+  `'node.keyObject'`, a {KeyObject}.
 
 Exports the given key into the specified format, if supported.
 
@@ -695,7 +695,7 @@ added: v15.0.0
 -->
 
 * `format`: {string} Must be one of `'raw'`, `'pkcs8'`, `'spki'`, `'jwk'`, or
-  `node.keyObject`.
+  `'node.keyObject'`.
 * `keyData`: {ArrayBuffer|TypedArray|DataView|Buffer|KeyObject}
 <!--lint disable maximum-line-length remark-lint-->
 * `algorithm`: {RsaHashedImportParams|EcKeyImportParams|HmacImportParams|AesImportParams|Pbkdf2ImportParams|NodeDsaImportParams|NodeDhImportParams|NodeScryptImportParams|NodeEdKeyImportParams}
@@ -1465,7 +1465,7 @@ added: v15.0.0
 
 The Node.js Web Crypto API extends various aspects of the Web Crypto API.
 These extensions are consistently identified by prepending names with the
-`node.` prefix. For instance, the `node.keyObject` key format can be
+`node.` prefix. For instance, the `'node.keyObject'` key format can be
 used with the `subtle.exportKey()` and `subtle.importKey()` methods to
 convert between a WebCrypto {CryptoKey} object and a Node.js {KeyObject}.