ci: Upload Trivy SARIF artifact

[khvn26]

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Changes

This incorporates Flagsmith/actions#5 so the Trivy scan SARIF results are downloadable/shareable.

How did you test this code?

This is a CI change.

[vercel]

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3 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)	Visit Preview		May 16, 2025 4:57pm
flagsmith-frontend-preview	⬜️ Ignored (Inspect)	Visit Preview		May 16, 2025 4:57pm
flagsmith-frontend-staging	⬜️ Ignored (Inspect)	Visit Preview		May 16, 2025 4:57pm

[github-actions]

Docker builds report

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-5437	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api-test:pr-5437	Finished ✅	Skipped
ghcr.io/flagsmith/flagsmith-api:pr-5437	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-frontend:pr-5437	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith:pr-5437	Finished ✅	Results ✅
ghcr.io/flagsmith/flagsmith-private-cloud:pr-5437	Finished ✅	Results ✅

[github-actions]

Uffizzi Ephemeral Environment Deploying

☁️ https://app.uffizzi.com/github.com/Flagsmith/flagsmith/pull/5437

⚙️ Updating now by workflow run 14912268965.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.65%. Comparing base (4aa9e1b) to head (f65a6ab).
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5437      +/-   ##
==========================================
+ Coverage   97.63%   97.65%   +0.02%     
==========================================
  Files        1234     1235       +1     
  Lines       42992    43326     +334     
==========================================
+ Hits        41974    42309     +335     
+ Misses       1018     1017       -1     

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