🔧 Fix Slack Alert Failing by Only Using Commit Header

[connormaglynn]

👀 Purpose

• In relation to 🐛 BUG: Slack Alert on Terraform Apply Failure Broken #1009
• To fix JSON parse error on multi-line commits by only using the commit header title in the message

♻️ What's changed

• Replace the current strategy of replacing new line characters (which didn't work) with only retrieving the commit message header for displaying in Slack

📝 Notes

• Temporary workflow still there to test this in my testing channel 🧪

[github-actions]

🦙 MegaLinter status: ❌ ERROR

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	3		0	0.05s
❌ REPOSITORY	gitleaks	yes		2	0.76s
✅ REPOSITORY	trivy	yes		no	27.16s
✅ YAML	prettier	3		0	0.46s

See detailed report in MegaLinter reports
Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff

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LGTM