tails-security-check never displays any notification
It was broken when adjusting for incremental upgrades (commit bad66c6) last November. Too bad we would need it working right now that the security announce wrt. I2P 0.9.13 was pushed.
Fix condition clause in tails-security-check (Closes: #7657).
Without this fix: the condition clause always returns true; so, as long as an
entry in the Atom feed has at least one category assigned, the is_not_fixed
function returns false, and no notification for this entry is displayed.