Add woff2 versions of _Source Code Pro_ v2.038/v1.058-it

Author: Nemo157

static/SourceCodePro-It.ttf.woff2

@@ -42,19 +42,25 @@
     font-weight: 400;
     /* Avoid using locally installed font because bad versions are in circulation:
      * see https://github.com/rust-lang/rust/issues/24355 */
-    src: url("SourceCodePro-Regular.ttf.woff") format('woff');
+    src:
+      url("SourceCodePro-Regular.ttf.woff2") format('woff2'),
+      url("SourceCodePro-Regular.ttf.woff") format('woff');
 }
 @font-face {
     font-family: 'Source Code Pro';
     font-style: normal;
     font-weight: 600;
-    src: url("SourceCodePro-Semibold.ttf.woff") format('woff');
+    src:
+      url("SourceCodePro-Semibold.ttf.woff2") format('woff2'),
+      url("SourceCodePro-Semibold.ttf.woff") format('woff');
 }
 @font-face {
     font-family: 'Source Code Pro';
     font-style: italic;
     font-weight: 400;
-    src: url("SourceCodePro-It.ttf.woff") format('woff');
+    src:
+      url("SourceCodePro-It.ttf.woff2") format('woff2'),
+      url("SourceCodePro-It.ttf.woff") format('woff');
 }
 
 html,