[CHANGE] Replaced deprecated templatetag

[ppfeufer]

Description

Changed

• Replaced deprecated templatetag

Type of Change:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality not to work as expected)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have checked my code and corrected any misspellings

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.27%. Comparing base (b87d3aa) to head (223ef6c).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #457   +/-   ##
=======================================
  Coverage   99.27%   99.27%           
=======================================
  Files          28       28           
  Lines        1227     1227           
  Branches       80       80           
=======================================
  Hits         1218     1218           
  Misses          1        1           
  Partials        8        8           

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