Help/About: Revert subtle color to actually subtle color on Get Involved.

Reviewed By peterwilsoncc.
Merges [60136] to the 6.8 branch.

Props densinakum, courane01.
See #63025.


Built from https://develop.svn.wordpress.org/branches/6.8@60138


git-svn-id: http://core.svn.wordpress.org/branches/6.8@59474 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/about-rtl.css

@@ -23,7 +23,7 @@
 .about__container {
 	/* Section backgrounds */
 	--background: #f6f5f2;
-	--subtle-background: yellow;
+	--subtle-background: #eef0fd;
 
 	/* Main text color */
 	--text: #1e1e1e;

wp-admin/css/about.css

@@ -22,7 +22,7 @@
 .about__container {
 	/* Section backgrounds */
 	--background: #f6f5f2;
-	--subtle-background: yellow;
+	--subtle-background: #eef0fd;
 
 	/* Main text color */
 	--text: #1e1e1e;