Update PR template to raise awareness of security dashboards plugin static list

[derek-ho]

Description

This PR updates the PR template to add awareness around opening a corresponding PR in the security dashboards repo when adding new roles/permissions.

• Category (Enhancement, New feature, Bug fix, Test fix, Refactoring, Maintenance, Documentation) Enhancement
• Why these changes are required? Bringing awareness to the static list in the security dashboards plugin, hopefully avoid release time misses
• What is the old behavior before changes and new behavior after changes? No awareness that the security dashboards plugin maintains a static list

Issues Resolved

Fix: #4330

Check List

• [ ] New functionality includes testing
• [ ] New functionality has been documented
• [x] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license. For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov[bot]]

Codecov Report

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

Project coverage is 65.29%. Comparing base (1d1b1ed) to head (20a5ec8). Report is 4 commits behind head on main.

Additional details and impacted files

[](https://app.codecov.io/gh/opensearch-project/security/pull/4476?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project) ```diff @@ Coverage Diff @@ ## main #4476 +/- ## ========================================== + Coverage 65.25% 65.29% +0.04% ========================================== Files 312 313 +1 Lines 22035 22058 +23 Branches 3560 3563 +3 ========================================== + Hits 14379 14403 +24 + Misses 5888 5885 -3 - Partials 1768 1770 +2 ``` [see 8 files with indirect coverage changes](https://app.codecov.io/gh/opensearch-project/security/pull/4476/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=opensearch-project)

[reta]

@derek-ho DCO check is failing sadly :(