chore: Update role to latest NGINX best practices

[alessfg]

Proposed changes

Update community docs & required workflows per the latest NGINX template repository guidelines.

Checklist

Before creating a PR, run through this checklist and mark each as complete:

• I have read the contributing guidelines.
• I have signed the F5 Contributor License Agreement (CLA).
• If applicable, I have added Molecule tests that prove my fix is effective or that my feature works.
• If applicable, I have checked that any relevant Molecule tests pass after adding my changes.
• I have updated any relevant documentation (defaults/main/*.yml, README.md and CHANGELOG.md).

[Copilot]

Pull Request Overview

This PR updates documentation and CI/CD workflows to align with the latest NGINX best practices from the NGINX template repository. Key changes include:

• Revised community support and security reporting details in SUPPORT.md and SECURITY.md.
• Updates to documentation files (README.md, CONTRIBUTING.md, CHANGELOG.md) with corrected links and guidelines.
• Modifications to GitHub workflows and issue/PR templates to reflect updated CLA details and workflow triggers.

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
SUPPORT.md	Updated support instructions and changed references from Slack to forum.
SECURITY.md	Adjusted vulnerability reporting methods and updated documentation links.
README.md	Updated CI/CD badges and added OpenSSF Scorecard badge.
CONTRIBUTING.md	Revised installation guide reference and updated CLA information.
CHANGELOG.md	Modified changelog note to include required workflow updates.
.github/workflows/ossf_scorecard.yml	Added push event trigger and updated comments.
.github/workflows/f5_cla.yml	Updated CLA document URL and clarified branch usage for CLA signatures.
.github/scorecard.yml	New configuration file for scorecard analysis.
.github/pull_request_template.md	Corrected CLA link (although the updated link is inconsistent with others).
.github/ISSUE_TEMPLATE/feature_request.yml	Added new feature request template.
.github/ISSUE_TEMPLATE/config.yml	Added new issue template configuration.
.github/ISSUE_TEMPLATE/bug_report.yml	Added new bug report template.
.github/ISSUE_TEMPLATE/feature_request.md	Removed deprecated template.
.github/ISSUE_TEMPLATE/bug_report.md	Removed deprecated template.

Comments suppressed due to low confidence (1)

.github/workflows/f5_cla.yml:32

• [nitpick] The use of the 'branch' parameter for storing CLA signatures may cause confusion with other branch references. Consider renaming or adding a clarifying comment to distinguish its purpose.

branch: main