fix links

docs/tickets.md

@@ -5,10 +5,12 @@ We sure it will not happen before end of May.
 Tickets will definitely be more expensive than four years ago, to nobody’s surprise.
 As always, there will be the option to apply for a Friends Ticket at a reduced price if the regular ticket price is not feasible for you.
 The presale will be run as a simple open presale (no vouchers!). We will release batches of tickets at three different times.
-The presale dates will be announced on the [Blog](events.ccc.de), so follow the RSS feed!
+The presale dates will be announced on the [Blog](https://events.ccc.de), so follow the RSS feed!
 
 You will need an extra ticket to park your car, as well as you will need an extra ticket to bring a camper van.
 
+## Questions?
+
 You can reach us at <camp2023-tickets@cccv.de> if you have questions.
 
 ## Visa