(maint) Add missing "v" in heading link

[gep13]

Description Of Changes

Add missing "v" in heading link

Motivation and Context

Without it, the link to the heading does not work.

Also, all the notifications that went out would have had a v in the link.

Testing

• I have previewed these changes using the Docker Container or another method before submitting this pull request.

Change Types Made

• Minor documentation fix (typos etc.).
• Major documentation change (refactoring, reformatting or adding documentation to existing page).
• New documentation page added.
• The change I have made should have a video added, and I have raised an issue for this.
  • Issue #

Change Checklist

• Requires a change to menu structure (top or left-hand side)/
• Menu structure has been updated
• Images added to the img repository?
  • PR -

Related Issue

N/A

[AdmiringWorm]

LGTM, thanks for catching and updating this.