Component: p-inputGroup

[mcrightworks]

Describe the bug

Icon is not showing for p-inputGroup, nor is class in v17 upgrade

<p-inputGroup>
     <input type="text" pInputText placeholder="Find help articles..." />
     <button type="button" pButton icon="pi pi-check" class="p-button-warning"></button>
     <!-- //testing to make sure it works standalone. -->
     <i class="pi pi-check"></i>  //this icon displays correctly.
   </p-inputGroup>

Environment

"dependencies": {
"@angular/animations": "^17.0.8",
"@angular/common": "^17.0.8",
"@angular/compiler": "^17.0.8",
"@angular/core": "^17.0.8",
"@angular/forms": "^17.0.8",
"@angular/platform-browser": "^17.0.8",
"@angular/platform-browser-dynamic": "^17.0.8",
"@angular/router": "^17.0.8",
"chart.js": "^4.4.1",
"primeflex": "^3.3.1",
"primeicons": "^6.0.1",
"primeng": "^17.3.0",
"rxjs": "~7.8.0",
"tslib": "^2.3.0",
"zone.js": "~0.14.2"
},

Reproducer

No response

Angular version

17.0.8

PrimeNG version

17.3.0

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

20

Browser(s)

No response

Steps to reproduce the behavior

<p-inputGroup>
  <input type="text" pInputText placeholder="Find help articles..." />
  <button type="button" pButton icon="pi pi-check" class="p-button-warning"></button> //icon and class color not displaying
  <!-- //testing to make sure it works standalone. -->
  <i class="pi pi-check"></i>
</p-inputGroup>

Expected behavior

Icon should display with background color class.

[mcrightworks]

was missing button module import, might want to add that to docs.