fix(*): restore missing rule definition

Author: cdransf

components/actionbutton/index.css

@@ -232,6 +232,8 @@
 
 	/* stylelint-disable-next-line property-no-vendor-prefix -- Correct the inability to style clickable types in iOS and Safari (normalize). */
 	-webkit-appearance: button;
+	
+	border-style: solid;
 
 	transition:
 		background var(--mod-button-animation-duration, var(--spectrum-animation-duration-100)) ease-out,