Merge pull request #996 from Automattic/fix/issue-971

Modern Business: fixes post title styles for Posts List Block

modern-business/sass/blocks/_blocks.scss

@@ -1149,6 +1149,7 @@
 		font-size: $font__size-lg;
 		margin: 0;
 		text-align: center;
+		font-weight: 300;
 	}
 
 	.a8c-posts-list-item__meta {

modern-business/style-rtl.css

@@ -4588,6 +4588,7 @@ body.page .main-navigation {
   font-size: 1.6875em;
   margin: 0;
   text-align: center;
+  font-weight: 300;
 }
 
 .entry .entry-content .a8c-posts-list-item__meta {

modern-business/style.css

@@ -4600,6 +4600,7 @@ body.page .main-navigation {
   font-size: 1.6875em;
   margin: 0;
   text-align: center;
+  font-weight: 300;
 }
 
 .entry .entry-content .a8c-posts-list-item__meta {