docs: update security email

[vinckr]

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 #1077 (e7562fc) into master (0e3c249) will decrease coverage by 0.60%.
The diff coverage is n/a.

❗ Current head e7562fc differs from pull request most recent head 89cc101. Consider uploading reports for the commit 89cc101 to get more accurate results

@@            Coverage Diff             @@
##           master    #1077      +/-   ##
==========================================
- Coverage   78.45%   77.86%   -0.60%     
==========================================
  Files          80       80              
  Lines        3806     3921     +115     
==========================================
+ Hits         2986     3053      +67     
- Misses        548      589      +41     
- Partials      272      279       +7     

see 2 files with indirect coverage changes

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