Add GH ticket to recent changes

Author: oalders

Changes

@@ -1,9 +1,9 @@
 Revision history for HTTP-Message
 
 {{$NEXT}}
-    - Don't inherit from Exporter anymore (Max Maischein)
-    - Remove superfluous Perl version requirement. This module requires
-      Perl 5.6 or newer. (Max Maischein)
+    - Don't inherit from Exporter anymore (GH#155) (Max Maischein)
+    - Remove superfluous Perl version requirement. This module requires Perl
+      5.6 or newer. (GH#155) (Max Maischein)
 
 6.29      2021-03-06 04:50:34Z
     - fix issue with HTTP::Request internal cache for canonical url when using