The escape property does not work for label in Slide Menu component

[mrfy]

Hi

I'm submitting a ...

[x] bug report => Search github for a similar issue or PR before submitting

Plunkr Case (Bug Reports)
Here is the code on stackblitz, inside a comparison with a properly functioning Menu Module component
https://stackblitz.com/edit/primeng-treetableselection-demo-kuxx38?file=src%2Fapp%2Fapp.component.ts

Current behavior
Label of a slide menu does not support html values.

Expected behavior
Label of a slide menu both supports simple strings and html values as well.

What is the motivation / use case for changing the behavior?
Use html value as title of menu.

Please tell us about your environment:
OS Name: Microsoft Windows 10 Pro
Version: 10.0.19043 Build 19043
Visual Studio Code

• Angular version:
  12.2.5

• PrimeNG version:
  12.2.2

• Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS] n/a

• Language: [all | TypeScript X.X | ES6/7 | ES5]
  n/a

• Node (for AoT issues): node --version =
  n/a