Update vnodes.md

[dead-claudia]

Description

Fix a broken link

Motivation and Context

Did some further digging (it's been a while since I've played with the scripts) and found that the JSFiddle errors are just warnings. The error was actually this.

How Has This Been Tested?

Just using this PR as the test. If it passes, my hypothesis is correct and we're back in business.

Types of changes

• 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 change)
• Documentation change

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have updated docs/changelog.md