[Dev] Dev PR issue bot does not correctly detect MINOR issues

[raulcd]

Describe the bug, including details regarding any error messages, version, and platform.

As seen here:
#44973 (comment)

The Dev PR workflow currently fails for Minor issues.

We should not assume the issue is a GitHub issue for MINOR PRs, see the related code:
https://github.com/apache/arrow/pull/44936/files#diff-cdf16bb28f8aef5eeb1213fa302a992b3c8f8eba0e2b7af893e794cb5cdbf0fcR80-R83

Component(s)

Developer Tools

[kou]

Issue resolved by pull request 44975
#44975