Twenty Seventeen: Resolves default border style visibility for pullquote block.

When a border color and width was added to the pullquote block but no border style was chosen the border was not visible. The expectation is that the border has a solid style by default when a color is selected.

Props pranitdugad, poena, sabernhardt.
Fixes #61362.

Built from https://develop.svn.wordpress.org/trunk@58469


git-svn-id: http://core.svn.wordpress.org/trunk@57918 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentyseventeen/assets/css/blocks.css

@@ -166,7 +166,7 @@ p.has-drop-cap:not(:focus)::first-letter {
 /* Pullquote */
 
 .wp-block-pullquote {
-	border: 0;
+	border: 0 solid;
 }
 
 .wp-block-pullquote__citation,

wp-content/themes/twentyseventeen/assets/css/editor-blocks.css

@@ -646,7 +646,7 @@ html[lang="th"] .edit-post-visual-editor * {
 /* Pullquote */
 
 .wp-block-pullquote {
-	border: 0;
+	border: 0 solid;
 }
 
 .wp-block-pullquote.alignleft blockquote > .editor-rich-text p,

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-beta3-58468';
+$wp_version = '6.6-beta3-58469';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.