Fix .gitignore

[zhiltsov-max]

Motivation and context

The updated patterns led to unexpected ignoring of helm-charts/templates/.

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have created a changelog fragment
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (see GitHub docs)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.43%. Comparing base (7484e4d) to head (fae4864).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #9030      +/-   ##
===========================================
- Coverage    73.43%   73.43%   -0.01%     
===========================================
  Files          418      418              
  Lines        44299    44299              
  Branches      3870     3870              
===========================================
- Hits         32533    32531       -2     
- Misses       11766    11768       +2     

Components	Coverage Δ
cvat-ui	77.41% <ø> (-0.01%)	⬇️
cvat-server	70.12% <ø> (ø)