Varia: migrate sass/blocks/posts-list

varia/sass/blocks/posts-list/_style.scss

@@ -12,6 +12,7 @@
 	color: #{map-deep-get($config-global, "color", "background", "default")};
 	background-color: #{map-deep-get($config-global, "color", "primary", "default")};
 	font-family: #{map-deep-get($config-global, "font", "family", "primary")};
+	font-family: var( --font-headings, #{map-deep-get($config-global, "font", "family", "primary")} );
 	font-weight: bold;
 	font-size: #{map-deep-get($config-global, "font", "size", "sm")};
 	line-height: 1;

varia/style.css

@@ -1685,6 +1685,7 @@ p.has-background {
 	color: white;
 	background-color: blue;
 	font-family: sans-serif;
+	font-family: var(--font-headings, sans-serif);
 	font-weight: bold;
 	font-size: 0.83333rem;
 	line-height: 1;