docs: add link to html version of source COPYING.txt

rouilj · rouilj · commit 90fcfe0a83dd · 2024-06-05T09:33:48.000-04:00
Remove an orphaned file COPYING.txt only shows up in sitemap) from
ahrefs scan.
diff --git a/doc/license.txt b/doc/license.txt
@@ -1,8 +1,8 @@
 License
 =======
 
-Roundup is Free Software under the following license (from the file
-COPYING.txt in the software distribution):
+Roundup is Free Software under the following license (from the
+`file COPYING.txt <../COPYING.html>` in the software distribution):
 
 .. raw:: html
 
