Meta: fix border-bottom-* and border-top-* linking errors (#260)

Author: miketaylr

compatibility.bs

@@ -58,6 +58,10 @@ urlPrefix: https://drafts.csswg.org/css-values-3/
 spec:css-animations-1; type:property; text:animation-delay
 spec:css-borders-4; type:property; text:box-shadow
 spec:css-borders-4; type:property; text:border-radius
+spec:css-borders-4; type:property; text:border-bottom-left-radius
+spec:css-borders-4; type:property; text:border-bottom-right-radius
+spec:css-borders-4; type:property; text:border-top-left-radius
+spec:css-borders-4; type:property; text:border-top-right-radius
 spec:css-conditional-3; type:at-rule; text:@media
 spec:css-display-3; type:value; for:display; text:flex
 spec:css-flexbox-1; type:value; text:inline-flex