Bug 1912377 - fix checkbox icon display r=reusable-components-reviewers,tgiles

Differential Revision: https://phabricator.services.mozilla.com/D218933

toolkit/content/widgets/moz-checkbox/moz-checkbox.css

@@ -57,6 +57,6 @@ input,
   margin-inline-start: var(--checkbox-space-offset);
 }
 
-.text {
+.label {
   padding-inline-end: var(--space-xsmall);
 }

toolkit/content/widgets/moz-checkbox/moz-checkbox.mjs

@@ -150,8 +150,8 @@ export default class MozCheckbox extends MozLitElement {
         />
         <span class="label-content">
           ${this.iconTemplate()}
-          <span>
-            <span class="text">${this.label}</span>
+          <span class="text">
+            <span class="label">${this.label}</span>
             ${this.supportLinkTemplate()}
           </span>
         </span>