URL-Encode links with special chars

[jadyndev]

The links to the NORTx overview page on the camp23 site is broken in Firefox (116.0.3 apple-darwin):

The source shows: /c/camp2023/Nerds der OberRheinischen Tiefebene und der xHain (N\:O:R:T:x)
This is converted to: /c/camp2023/Nerds der OberRheinischen Tiefebene und der xHain (N/:O:R:T:x), which is invalid

This can be fixed by urlencoding the link in the source like this: /c/camp2023/Nerds%20der%20OberRheinischen%20Tiefebene%20und%20der%20xHain%20(N%5C%3AO%3AR%3AT%3Ax)

(encoding the \should be enough)

[saerdnaer]

Just for the sake of completeness, where is a working link: https://media.ccc.de/c/camp2023/Nerds%20der%20OberRheinischen%20Tiefebene%20und%20der%20xHain%20(N%5C:O:R:T:x)
(We should have stripped down that tag to NORTx, and skip the long form – but now it's proably to late to change this…)

The corresponding line where we proably should fix this is here:

voctoweb/app/views/frontend/shared/_event_metadata.haml

Line 18 in c4e7039

!= link_for(event.conference, tag)