Twenty Twenty: Correct the border style of the pull quote block in th…

…e editor.

This change makes the border of the pull quote block visible in the editor when the user selects a border color or thickness,
by setting the default border style to solid.

Props nidhidhandhukiya, ugyensupport, dhruvang21, sabernhardt, divyeshk71, poena.
Fixes #62301.

git-svn-id: https://develop.svn.wordpress.org/trunk@59390 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-content/themes/twentytwenty/assets/css/editor-style-block-rtl.css

@@ -791,7 +791,7 @@ hr.wp-block-separator.is-style-dots::before {
 /* Block: Pullquote -------------------------- */
 
 .editor-styles-wrapper .wp-block-pullquote {
-	border: none;
+	border: 0 solid;
 	color: inherit;
 	padding: 0;
 	position: relative;

src/wp-content/themes/twentytwenty/assets/css/editor-style-block.css

@@ -795,7 +795,7 @@ hr.wp-block-separator.is-style-dots::before {
 /* Block: Pullquote -------------------------- */
 
 .editor-styles-wrapper .wp-block-pullquote {
-	border: none;
+	border: 0 solid;
 	color: inherit;
 	padding: 0;
 	position: relative;