Add extrabold styles to css

Author: jhaemin

web/fonts-public.css

@@ -8,6 +8,16 @@
   font-style: normal;
 }
 
+@font-face {
+  font-family: 'Interop';
+  src: url('https://raw.githubusercontent.com/payw-org/Interop/main/web/fonts/Interop-ExtraBold.woff2')
+      format('woff2'),
+    url('https://raw.githubusercontent.com/payw-org/Interop/main/web/fonts/Interop-ExtraBold.woff')
+      format('woff');
+  font-weight: 800;
+  font-style: normal;
+}
+
 @font-face {
   font-family: 'Interop';
   src: url('https://raw.githubusercontent.com/payw-org/Interop/main/web/fonts/Interop-Bold.woff2')

web/fonts.css

@@ -6,6 +6,14 @@
   font-style: normal;
 }
 
+@font-face {
+  font-family: 'Interop';
+  src: url('/fonts/Interop-ExtraBold.woff2') format('woff2'),
+    url('/fonts/Interop-ExtraBold.woff') format('woff');
+  font-weight: 800;
+  font-style: normal;
+}
+
 @font-face {
   font-family: 'Interop';
   src: url('/fonts/Interop-Bold.woff2') format('woff2'),