🎨(react) make eof stylesheets consistent

Some older tools misbehave if the last line of data
in a text file is not terminated with a newline.
It makes sure the last line was properly terminated.

packages/react/src/components/Accessibility/index.scss

@@ -9,4 +9,4 @@
   clip-path: inset(50%);
   white-space: nowrap;
   border: 0;
-}
+}