(maint) Update labeller.yml from pull_request_type to pull_request

[pmcmaw]

Summary

Provide a detailed description of all the changes present in this pull request.

Additional Context

Add any additional context about the problem here.

• [ ] Root cause and the steps to reproduce. (If applicable)
• [ ] Thought process behind the implementation.

Related Issues (if any)

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Checklist

• [ ] 🟢 Spec tests.
• [ ] 🟢 Acceptance tests.
• [ ] Manually verified.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 88.24%. Comparing base (ef19b63) to head (7cd5df6).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1367 +/- ## ======================================= Coverage 88.24% 88.24% ======================================= Files 128 128 Lines 5435 5435 ======================================= Hits 4796 4796 Misses 639 639 ```

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