chore(deps): update actions/cache action to v5

[dd-octo-sts]

This PR contains the following updates:

Package	Type	Update	Change
actions/cache	action	major	v4 → v5

⚠️ GitHub Actions Major Version Update

This PR updates GitHub Actions dependencies with major version changes. Major updates may include breaking changes.

---

• Version Upgrader Overview

• Questions or feedback? Ask in #adms-version-upgrades

🤖 Generated by ADMS (Automated Dependency Management System)

[datadog-prod-us1-5]

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 57.28% (+0.00%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: 7afe6cf | Docs | Datadog PR Page | Give us feedback!}