Fix missing build sidebar error icon (#3806)

The build sidebar currently only renders the warning icon, when it
should render both the warning and error icons when appropriate. This PR
fixes the issue by properly importing the error icon.

Author: williamjallen

resources/js/vue/components/shared/BuildSidebar.vue

@@ -114,6 +114,7 @@ import {
   faWrench,
   faHammer,
   faTriangleExclamation,
+  faCircleExclamation,
   faFlask,
   faUmbrella,
   faBug,
@@ -217,6 +218,7 @@ export default {
         faWrench,
         faHammer,
         faTriangleExclamation,
+        faCircleExclamation,
         faFlask,
         faUmbrella,
         faBug,