Add link to dokuwiki docs on uploadsize

playbooks/files/chaosknoten/configs/wiki/nginx/wiki.ccchh.net.conf

@@ -23,6 +23,7 @@ server {
     add_header Strict-Transport-Security "max-age=63072000" always;
 
     # Maximum file upload size is 20MB - change accordingly if needed
+    # See: https://www.dokuwiki.org/faq:uploadsize
     client_max_body_size 20M;
     client_body_buffer_size 128k;