Correct service specific deep links to portal

Links to services in portal do not work anymore, because the linking logic (after the plony import https://gitlab.hzdr.de/hifis/cloud/access-layer/portal/-/merge_requests/112 ) changed.

Same will need to be done with techdoc, newsletter, A4 page outlet, and probably more :-(

List of now-broken links detected: https://helmholtz.cloud/services?...

search and replace in all relevant repositories:

• hifis.net (this MR)
  • corresponding newsletter pdf
• hifis techdoc https://gitlab.hzdr.de/hifis/overall/hifis-technical-documentation/-/merge_requests/323
• HIFIS Intro letter https://gitlab.hzdr.de/hifis/overall/communication/overview-materials/-/merge_requests/24