fix(admin-ui): Import missing social-shapes icons

packages/admin-ui/src/polyfills.ts

@@ -81,4 +81,5 @@ import '@clr/icons/shapes/essential-shapes';
 import '@clr/icons/shapes/media-shapes';
 import '@clr/icons/shapes/technology-shapes';
 import '@clr/icons/shapes/travel-shapes';
+import '@clr/icons/shapes/social-shapes';
 import '@webcomponents/custom-elements/custom-elements.min.js';