Add a missing scheme when getting the Element .well-known file.

[pixlwave]

As reported by @bmarty (thanks!).

[github-actions]

	Warnings
⚠️	Some of the commits are missing ticket numbers. Please consider squashing all commits that don't have a tracking number.

Generated by 🚫 Danger Swift against 2df1485

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.82%. Comparing base (dac363c) to head (2df1485).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2995   +/-   ##
========================================
  Coverage    77.82%   77.82%           
========================================
  Files          694      694           
  Lines        53834    53834           
========================================
  Hits         41897    41897           
  Misses       11937    11937           

Flag	Coverage Δ
unittests	68.47% <ø> (-0.04%)	⬇️

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