[css-conditional] Use version of bikeshed with curly quotes in footer.

from speced/bikeshed#554

Author: dbaron

css-conditional/Overview.html

@@ -793,22 +793,22 @@ <h2 class="no-num heading settled" id="acknowledgments"><span class="content">Ac
   <h2 class="no-ref no-num heading settled" id="conformance"><span class="content"> Conformance</span><a class="self-link" href="#conformance"></a></h2>
   <h3 class="heading settled" id="document-conventions"><span class="content"> Document conventions</span><a class="self-link" href="#document-conventions"></a></h3>
   <p>Conformance requirements are expressed with a combination of
-	descriptive assertions and RFC 2119 terminology. The key words "MUST",
-	"MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT",
-	"RECOMMENDED", "MAY", and "OPTIONAL" in the normative parts of this
+	descriptive assertions and RFC 2119 terminology. The key words “MUST”,
+	“MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”,
+	“RECOMMENDED”, “MAY”, and “OPTIONAL” in the normative parts of this
 	document are to be interpreted as described in RFC 2119.
 	However, for readability, these words do not appear in all uppercase
 	letters in this specification. </p>
   <p>All of the text of this specification is normative except sections
 	explicitly marked as non-normative, examples, and notes. <a data-link-type="biblio" href="#biblio-rfc2119">[RFC2119]</a> </p>
-  <p>Examples in this specification are introduced with the words "for example"
+  <p>Examples in this specification are introduced with the words “for example”
 	or are set apart from the normative text with <code>class="example"</code>,
 	like this: </p>
   <div class="example" id="example-52448c84">
    <a class="self-link" href="#example-52448c84"></a> 
    <p>This is an example of an informative example. </p>
   </div>
-  <p>Informative notes begin with the word "Note" and are set apart from the
+  <p>Informative notes begin with the word “Note” and are set apart from the
 	normative text with <code>class="note"</code>, like this: </p>
   <p class="note" role="note">Note, this is an informative note. </p>
   <p>Advisements are normative sections styled to evoke special attention and are