Fix validation of CSS markup (#569)

SHA: 3e1a960
Reason: push, by @antosart

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

index.html

@@ -8,7 +8,7 @@
   <link href="https://www.w3.org/2008/site/images/favicon.ico" rel="icon">
   <meta content="Bikeshed version 44af0bf3e, updated Fri Jul 29 17:05:16 2022 -0700" name="generator">
   <link href="https://www.w3.org/TR/CSP3/" rel="canonical">
-  <meta content="5f6b45ac07858949aa432d69a8f618ee42f8e22f" name="document-revision">
+  <meta content="3e1a960e24d86f740c793940a1931a76c6a182ff" name="document-revision">
 <style>
   ul.toc ul ul ul {
     margin: 0 0 0 2em;
@@ -19,7 +19,7 @@
 
   a[href^="http:"]:after {
     color: red;
-    content: "🔓";
+    content: "\1F512";  /* A lock symbol: 🔓. */
   }
 
   .wip {
@@ -324,13 +324,13 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72"> </a> </p>
    <h1>Content Security Policy Level 3</h1>
-   <p id="w3c-state"><a href="https://www.w3.org/standards/types#WD">W3C Working Draft</a>, <time class="dt-updated" datetime="2022-09-16">16 September 2022</time></p>
+   <p id="w3c-state"><a href="https://www.w3.org/standards/types#WD">W3C Working Draft</a>, <time class="dt-updated" datetime="2022-10-04">4 October 2022</time></p>
    <details open>
     <summary>More details about this document</summary>
     <div data-fill-with="spec-metadata">
      <dl>
       <dt>This version:
-      <dd><a class="u-url" href="https://www.w3.org/TR/2022/WD-CSP3-20220916/">https://www.w3.org/TR/2022/WD-CSP3-20220916/</a>
+      <dd><a class="u-url" href="https://www.w3.org/TR/2022/WD-CSP3-20221004/">https://www.w3.org/TR/2022/WD-CSP3-20221004/</a>
       <dt>Latest published version:
       <dd><a href="https://www.w3.org/TR/CSP3/">https://www.w3.org/TR/CSP3/</a>
       <dt>Editor's Draft:
@@ -6963,7 +6963,7 @@ <h3 class="no-num no-ref heading settled" id="normative"><span class="content">N
    <dt id="biblio-reporting">[REPORTING]
    <dd>Ilya Gregorik; Mike West. <a href="https://wicg.github.io/reporting/"><cite>Reporting API</cite></a>. URL: <a href="https://wicg.github.io/reporting/">https://wicg.github.io/reporting/</a>
    <dt id="biblio-reporting-1">[REPORTING-1]
-   <dd>Douglas Creager; Ian Clelland; Mike West. <a href="https://www.w3.org/TR/reporting-1/"><cite>Reporting API</cite></a>. 16 September 2022. WD. URL: <a href="https://www.w3.org/TR/reporting-1/">https://www.w3.org/TR/reporting-1/</a>
+   <dd>Douglas Creager; Ian Clelland; Mike West. <a href="https://www.w3.org/TR/reporting-1/"><cite>Reporting API</cite></a>. 17 September 2022. WD. URL: <a href="https://www.w3.org/TR/reporting-1/">https://www.w3.org/TR/reporting-1/</a>
    <dt id="biblio-rfc2119">[RFC2119]
    <dd>S. Bradner. <a href="https://datatracker.ietf.org/doc/html/rfc2119"><cite>Key words for use in RFCs to Indicate Requirement Levels</cite></a>. March 1997. Best Current Practice. URL: <a href="https://datatracker.ietf.org/doc/html/rfc2119">https://datatracker.ietf.org/doc/html/rfc2119</a>
    <dt id="biblio-rfc3492">[RFC3492]