refactor(aria/combobox): fix lint errors

Updates .css file to fix lint errors.

Author: essjay05

src/components-examples/aria/combobox/combobox-examples.css

@@ -156,5 +156,5 @@ ul[role='group'] {
 
 [ngCombobox][aria-disabled='true'] input.example-combobox-input {
   color: var(--mat-sys-on-surface-variant);
-  background-color: var(--mat-sys-surface); 
-}
+  background-color: var(--mat-sys-surface);
+}