doc: replace URL action example with form The example to provide a link to take or resolve an item was broken. Roundup has required a POST not GET for changes to the database for a while. This example was never fixed. Replaced a link using GET with a POSTed form. This changes the activating element from a link to a button. The button could be restyled as a link using CSS I think. The original example was also not canonical. It used :action rather than the canonical @action.

Other Docs
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.. toctree::
   :maxdepth: 2

   docs/upgrading-history

   docs/tracker_templates

   Design Overview <docs/overview>
   Design (original) <docs/design>

   docs/developers

   Notes about the MySQL Database backend <docs/mysql>
   Notes about the PostgreSQL Database backend <docs/postgresql>

   Richard Jones implementation notes <docs/implementation>
   docs/security-history