Bump current version to 8.20.1

Author: proux01

incl/macros.html

@@ -1,3 +1,3 @@
-<#def CURRENTVERSION>8.20.0</#def>
+<#def CURRENTVERSION>8.20.1</#def>
 <#def CURRENTVERSIONTAG>V<#CURRENTVERSION></#def>
 <#def CURRENTCREDITSURL>https://github.com/coq/coq/blob/<#CURRENTVERSIONTAG>/CREDITS</#def>