[ci] Update PR validation workflow

[nemesifier]

Checklist

• I have read the OpenWISP Contributing Guidelines and OpenWISP Anti AI Spam Policy.
• N/A. This GitHub Actions caller-workflow change has no local manual execution path.
• N/A. No application code changed.
• N/A. No user-facing behavior or documentation changed.

Reference to Existing Issue

Related to openwisp/openwisp-utils#716

Description of Changes

Adds edited and ready_for_review pull request events so the shared workflow promptly revalidates changed descriptions. Makes the concurrency key PR-specific so newer events cancel outdated validation runs.

Screenshot

N/A. This is a GitHub Actions workflow-only change.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 2f1c3e1e-69d9-4edf-ab1d-71f4ae3460a5

📥 Commits

Reviewing files that changed from the base of the PR and between a2447f7 and 2bfe552.

📒 Files selected for processing (1)

• .github/workflows/bot-autoassign-pr-issue-link.yml

📜 Recent review details

⏰ Context from checks skipped due to timeout. (1)

• GitHub Check: Kilo Code Review

🧰 Additional context used

🪛 zizmor (1.28.0)

.github/workflows/bot-autoassign-pr-issue-link.yml

[error] 7-7: overly broad permissions (excessive-permissions): issues: write is overly broad at the workflow level

(excessive-permissions)

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[warning] 7-7: permissions without explanatory comments (undocumented-permissions): needs an explanatory comment

(undocumented-permissions)

🔇 Additional comments (1)

.github/workflows/bot-autoassign-pr-issue-link.yml (1)

4-4: LGTM!

Also applies to: 9-10

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📝 Walkthrough

Walkthrough

The pull request workflow now triggers for edited and ready_for_review actions in addition to its existing pull request events. Its concurrency group remains scoped to the repository and pull request number, but no longer varies by pull request action.

Estimated code review effort: 1 (Trivial) | ~3 minutes

🚥 Pre-merge checks | ✅ 8

✅ Passed checks (8 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is descriptive, uses the allowed [ci] type, and matches the workflow validation changes.
Description check	✅ Passed	The description clearly matches the workflow-only PR validation changes and their purpose.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Bug Fixes	✅ Passed	Workflow-only GitHub Actions change; no core user-facing code was changed, so the regression-test requirement is exempt per the workflow exception.
Features	✅ Passed	PASS — This is a workflow-only CI change; no product feature, docs, tests, or UI changed, so the feature-request checklist is not applicable.
Changes	✅ Passed	Workflow-only change; no documented behavior, UI, or public API changed, so docs/screenshots/tests aren’t applicable.
General Rules	✅ Passed	Workflow-only change is focused, readable, and introduces no obvious security, performance, or documentation issues.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/update-pr-validation-workflow

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