SNOW-1293828 Updated security policy

[sfc-gh-mhofman]

Description

Security policy information

Checklist

• Code compiles correctly
• Code is formatted according to Coding Conventions
• Created tests which fail without the change (if possible)
• All tests passing (dotnet test)
• Extended the README / documentation, if necessary
• Provide JIRA issue id (if possible) or GitHub issue id in PR name

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.34%. Comparing base (0303514) to head (41d0c18).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #904      +/-   ##
==========================================
- Coverage   84.35%   84.34%   -0.01%     
==========================================
  Files          89       89              
  Lines        9649     9683      +34     
  Branches      912      914       +2     
==========================================
+ Hits         8139     8167      +28     
- Misses       1276     1282       +6     
  Partials      234      234              

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