website/integrations: nextcloud: fix url for "disable username changes"

[4d62]

sdko/fix/nextcloud-href-12592

Closes #12592

Taking care of this for Tana as she's busy with other things and it's a quick fix

Details

REPLACE ME

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Checklist

• Local tests pass (ak test authentik/)
• The code has been formatted (make lint-fix)

If an API change has been made

• The API schema has been updated (make gen-build)

If changes to the frontend have been made

• The code has been formatted (make web)

If applicable

• The documentation has been updated
• The documentation has been formatted (make website)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.76%. Comparing base (9eef9ee) to head (41a98b6).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12725      +/-   ##
==========================================
+ Coverage   92.70%   92.76%   +0.05%     
==========================================
  Files         769      769              
  Lines       38898    38898              
==========================================
+ Hits        36062    36083      +21     
+ Misses       2836     2815      -21     

Flag	Coverage Δ
e2e	48.58% <ø> (+0.08%)	⬆️
integration	24.62% <ø> (ø)
unit	90.40% <ø> (+<0.01%)	⬆️

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