Twenty-Twenty One: Fixes quotation mark being outside with background.

The quotation marks were outside when the background color was applied.

Props nidhidhandhukiya, sabernhardt, shailu25, harshgajipara, poena, huzaifaalmesbah.
Fixes #57377. 


git-svn-id: https://develop.svn.wordpress.org/trunk@56567 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-content/themes/twentytwentyone/assets/css/ie-editor.css

@@ -1624,6 +1624,7 @@ pre.wp-block-preformatted {
 	position: relative;
 	border-left: none;
 	margin: 30px auto 30px 25px;
+	padding-left: 1em;
 }
 
 .wp-block-quote p {
@@ -1642,7 +1643,7 @@ pre.wp-block-preformatted {
 	content: "“";
 	font-size: 1.25rem;
 	line-height: 1.7;
-	left: -12px;
+	left: 8px;
 }
 
 .wp-block-quote .wp-block-quote__citation {