Reduce specificity of image rounded default style

Author: aaronrobertshaw

packages/block-library/src/image/style.scss

@@ -82,14 +82,6 @@
 		@include caption-style();
 	}
 
-	// Variations
-	&.is-style-rounded img,
-	.is-style-rounded img {
-		// We use an absolute pixel to prevent the oval shape that a value of 50% would give
-		// to rectangular images. A pill-shape is better than otherwise.
-		border-radius: 9999px;
-	}
-
 	// The following variation is deprecated.
 	// The CSS is kept here for the time being, to support blocks using the old variation.
 	&.is-style-circle-mask img {
@@ -148,6 +140,13 @@
 	}
 }
 
+// Variations
+:where(.wp-block-image.is-style-rounded img, .wp-block-image .is-style-rounded img) {
+	// We use an absolute pixel to prevent the oval shape that a value of 50% would give
+	// to rectangular images. A pill-shape is better than otherwise.
+	border-radius: 9999px;
+}
+
 .wp-block-image figure {
 	margin: 0;
 }