Fix typo in PR #696 (#698)

SHA: 658b98f
Reason: push, by @hayatoito

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

loading.html

@@ -6,7 +6,7 @@
   <link href="https://www.w3.org/StyleSheets/TR/2016/cg-draft" rel="stylesheet">
   <meta content="Bikeshed version d7036035b, updated Fri Oct 8 17:07:11 2021 -0700" name="generator">
   <link href="https://wicg.github.io/webpackage/loading.html" rel="canonical">
-  <meta content="4096cd031895ca1010e4fa453e4f867dbccc8eb0" name="document-revision">
+  <meta content="658b98f4e67913c39843c0099199108b70b58220" name="document-revision">
 <style>/* style-autolinks */
 
 .css.css, .property.property, .descriptor.descriptor {