Merge pull request #3110 from maxhaton/mention_dconf

Mention dconf at the top of index.dd

Author: mdparker

index.dd

@@ -12,6 +12,12 @@ $(DIVC intro, $(DIV, $(DIV,
         read fast, and run fast.
         $(BR)$(BR)Fast code, fast.)
 
+        $(BR)
+
+        $(TC p, pitch, $(B DConf online 2021) is $(LINK2 https://dconf.org, happening soon).
+        $(BR) November 20 and 21, 2021. Save the dates!
+        )
+
         $(DIVC download,
             $(DIVC btn-group-vertical,
               <a href="download.html" class="btn">Downloads</a>