Twenty Twenty: Correct alignment for embedded Instagram posts.

Props SGr33n, audrasjb, nielslange, JarretC.
Merges [46840] to the 5.3 branch.
Fixes #48688.
Built from https://develop.svn.wordpress.org/branches/5.3@46841


git-svn-id: http://core.svn.wordpress.org/branches/5.3@46641 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentytwenty/style-rtl.css

@@ -639,6 +639,11 @@ figcaption a,
 	color: inherit;
 }
 
+blockquote.instagram-media,
+iframe.instagram-media {
+	margin: auto !important;
+}
+
 
 /* GALLERIES */
 

wp-content/themes/twentytwenty/style.css

@@ -643,6 +643,11 @@ figcaption a,
 	color: inherit;
 }
 
+blockquote.instagram-media,
+iframe.instagram-media {
+	margin: auto !important;
+}
+
 
 /* GALLERIES */
 

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3.1-alpha-46839';
+$wp_version = '5.3.1-alpha-46841';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.