fix: add missing index

[aeneasr]

Related issue(s)

Checklist

• I have read the contributing guidelines.
• I have referenced an issue containing the design document if my change
  introduces a new feature.
• I am following the
  contributing code guidelines.
• I have read the security policy.
• I confirm that this pull request does not address a security
  vulnerability. If this pull request addresses a security vulnerability, I
  confirm that I got the approval (please contact
  security@ory.sh) from the maintainers to push
  the changes.
• I have added tests that prove my fix is effective or that my feature
  works.
• I have added or changed the documentation.

Further Comments

[codecov]

Codecov Report

Merging #3181 (6917819) into master (0002668) will not change coverage.
The diff coverage is n/a.

❗ Current head 6917819 differs from pull request most recent head 31a8ccd. Consider uploading reports for the commit 31a8ccd to get more accurate results

@@           Coverage Diff           @@
##           master    #3181   +/-   ##
=======================================
  Coverage   77.62%   77.62%           
=======================================
  Files         317      317           
  Lines       20046    20046           
=======================================
  Hits        15561    15561           
  Misses       3292     3292           
  Partials     1193     1193           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.