Change display to inline-block

packages/rocketchat-theme/assets/stylesheets/base.less

@@ -2520,7 +2520,8 @@ a.github-fork {
 			background-size: contain;
 			background-repeat: no-repeat;
 			background-position: center left;
-			display: inline-flex;
+			display: inline-block;
+			line-height: 0px;
 			box-shadow: inset 0 0 0 1px rgba(0,0,0,.1);
 			border-radius: 3px;
 			overflow: hidden;