Fixed 'method' not defaulting to HEAD request in Ping functionality

[Lorthiz]

Description

In the documentation it is pointed out that method "HEAD" should be used as default method for PING, but it was defaulting to 'unknown'

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I've read & comply with the contributing guidelines
• I have tested my code for new features & regressions on both mobile & desktop devices, using the latest version of major browsers.
• I have made corresponding changes to the documentation (README.md).
• I've checked my modifications for any breaking changes, especially in the config.yml file

[netlify]

✅ Deploy Preview for homer-demo-content ready!

Name	Link
🔨 Latest commit	c5aeaec
🔍 Latest deploy log	https://app.netlify.com/sites/homer-demo-content/deploys/634ad0339385500009d1d073
😎 Deploy Preview	https://deploy-preview-532--homer-demo-content.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[bastienwirtz]

Hey good catch. Thanks for contributing!