hopefully more distinct styling for the footer

Author: moritz

htmlify.pl

@@ -615,7 +615,7 @@ (Bool :$debug, Bool :$typegraph = False)
 sub footer-html() {
     state $dt = ~DateTime.now;
     qq[
-    <div id="footer">
+    <div class="FOOTER">
         <p>
             Generated on $dt from the sources at
             <a href="https://github.com/perl6/doc">perl6/doc on github</a>.