chore[ci]: add auto-labeling workflow

[cyberthirst]

What I did

• add workflow for auto-labeling opened/reopened issues with "needs triage"

edit: updated label name

How I did it

• reused a workflow from github for this exact purpose: https://docs.github.com/en/actions/use-cases-and-examples/project-management/adding-labels-to-issues#creating-the-workflow

How to verify it

Commit message

Commit message for the final, squashed PR. (Optional, but reviewers will appreciate it! Please see our commit message style guide for what we would ideally like to see in a commit message.)

Description for the changelog

Cute Animal Picture

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.02%. Comparing base (c02d2d8) to head (f88408b).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4276      +/-   ##
==========================================
- Coverage   91.30%   90.02%   -1.28%     
==========================================
  Files         110      110              
  Lines       15764    15764              
  Branches     3461     3461              
==========================================
- Hits        14393    14192     -201     
- Misses        935     1090     +155     
- Partials      436      482      +46     

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