Report Forms variable typo

[Laul0]

• Plateform: self-hosted (docker)
• Matomo version: 3.13.0

Current behavior

From the Tag Manager variables, in the Forms area, it is possible to retrieve the "Form Destination URL" and the variable name is {{FormDestionation}}

Expected behavior

The variable name should be {{FormDestination}}

[tsteur]

Cheers @Laul0
we'll change this as part of Matomo 4 in case the variable was already used previously because it could potentially break someones container if we just renamed the variable.

PR #214