Corrects the use of an before Number to a for proper grammar. (w3c#1896)

SHA: b8a7cdb
Reason: push, by pull[bot]

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: GeorgiosVeropoulos

index.html

@@ -176,7 +176,7 @@
 .mdn .samsunginternet_android::before{background-image:url(https://www.w3.org/assets/logos/browser-logos/samsung-internet/samsung-internet.svg)}
 .mdn .webview_android::before{background-image:url(https://www.w3.org/assets/logos/browser-logos/android-webview/android-webview.png)}
 </style>
-<meta name="revision" content="6b43932257f55d69edf4c8cfce159be2c094819a">
+<meta name="revision" content="b8a7cdb4a1e9112b6dd45fe70e0f0c3e57e225f5">
 <meta name="description" content="WebDriver is a remote control interface
 that enables introspection and control of user agents.
 It provides a platform- and language-neutral wire protocol
@@ -289,7 +289,7 @@
     ],
     "profile": "web-platform"
   },
-  "gitRevision": "6b43932257f55d69edf4c8cfce159be2c094819a",
+  "gitRevision": "b8a7cdb4a1e9112b6dd45fe70e0f0c3e57e225f5",
   "publishISODate": "2025-05-12T00:00:00.000Z",
   "generatedSubtitle": "W3C Editor's Draft 12 May 2025"
 }</script>
@@ -9779,7 +9779,7 @@ <h1 id="title" class="title">WebDriver</h1>
   of <a href="#dfn-getting-properties" class="internalDFN" data-link-type="dfn" id="ref-for-dfn-getting-properties-62">getting the property</a> <code>y</code>
   from <var>action item</var>.
 
- </p></li><li><p>If <var>y</var> is not an <a href="#dfn-number" class="internalDFN" data-link-type="dfn" id="ref-for-dfn-number-13">Number</a>, return <a href="#dfn-error" class="internalDFN" data-link-type="dfn" id="ref-for-dfn-error-232">error</a>
+ </p></li><li><p>If <var>y</var> is not a <a href="#dfn-number" class="internalDFN" data-link-type="dfn" id="ref-for-dfn-number-13">Number</a>, return <a href="#dfn-error" class="internalDFN" data-link-type="dfn" id="ref-for-dfn-error-232">error</a>
   with <a href="#dfn-error-code" class="internalDFN" data-link-type="dfn" id="ref-for-dfn-error-code-212">error code</a> <a href="#dfn-invalid-argument" class="internalDFN" data-link-type="dfn" id="ref-for-dfn-invalid-argument-89">invalid argument</a>.
 
  </p></li><li><p>Set the <code>y</code> property of <var>action</var>