Update font format.

themes/fonts/Blank/fonts.less

@@ -19,28 +19,28 @@ License:
 
 @font-face {
 	font-family: Pagella;
-	src: url('../../../fonts/Blank/texgyrepagella-regular.woff');
+	src: url('../../../fonts/Blank/texgyrepagella-regular.woff2');
 	font-weight: normal;
 	font-style: normal;
 }
 
 @font-face {
 	font-family: Pagella;
-	src: url('../../../fonts/Blank/texgyrepagella-bold.woff');
+	src: url('../../../fonts/Blank/texgyrepagella-bold.woff2');
 	font-weight: bold;
 	font-style: normal;
 }
 
 @font-face {
 	font-family: Pagella;
-	src: url('../../../fonts/Blank/texgyrepagella-italic.woff');
+	src: url('../../../fonts/Blank/texgyrepagella-italic.woff2');
 	font-weight: normal;
 	font-style: italic;
 }
 
 @font-face {
 	font-family: Pagella;
-	src: url('../../../fonts/Blank/texgyrepagella-bolditalic.woff');
+	src: url('../../../fonts/Blank/texgyrepagella-bolditalic.woff2');
 	font-weight: bold;
 	font-style: italic;
 }