Update angular.json

Author: bmarkov

demos/input/textarea/angular.json

@@ -24,6 +24,7 @@
             "styles": [
                	"./node_modules/@smart-webcomponents-angular/button/styles/smart.base.css",
 				"./node_modules/@smart-webcomponents-angular/button/styles/smart.button.css",
+				"./node_modules/@smart-webcomponents-angular/textarea/styles/smart.input.css",
 				"./node_modules/@smart-webcomponents-angular/radiobutton/styles/smart.radiobutton.css",
 				"./node_modules/@smart-webcomponents-angular/button/styles/smart.common.css",
                 "src/assets/fonts.css",