Fix stale action close reason

[EVDOG4LIFE]

Due to failures, changing to not_planned

What does this PR do?

Fixes error as called in failed workflow

Error: Unrecognized close-issue-reason "not-planned", valid values are: completed, not_planned
Error: Error: Unrecognized close-issue-reason "not-planned", valid values are: completed, not_planned
Error: Unrecognized close-issue-reason "not-planned", valid values are: completed, not_planned

Test Plan

(Write your test plan here. If you changed any code, please provide us with clear instructions on how you verified your changes work. Screenshots may also be helpful.)

Related PRs and Issues

• (Related PR or issue)

Checklist

• Have you read the Contributing Guidelines on issues?
• If the PR includes a change to an API's metadata (desc, label, params, etc.), does it also include updated API specs and example docs?