Revert "Update inter to 4.1"

This reverts commit 81065aa.

Author: indutny-signal

background.html

@@ -29,17 +29,54 @@
     <title>Signal</title>
     <link
       rel="preload"
-      href="fonts/InterVariable.woff2"
+      href="fonts/inter-v3.19/Inter-BoldItalic.woff2"
       as="font"
       crossorigin
       type="font/woff2"
     />
     <link
       rel="preload"
-      href="images/signal-logo.svg"
-      as="image"
-      crossorigin="anonymous"
+      href="fonts/inter-v3.19/Inter-Bold.woff2"
+      as="font"
+      type="font/woff2"
+      crossorigin
+    />
+    <link
+      rel="preload"
+      href="fonts/inter-v3.19/Inter-SemiBoldItalic.woff2"
+      as="font"
+      type="font/woff2"
+      crossorigin
+    />
+    <link
+      rel="preload"
+      href="fonts/inter-v3.19/Inter-Italic.woff2"
+      as="font"
+      type="font/woff2"
+      crossorigin
+    />
+    <link
+      rel="preload"
+      href="fonts/inter-v3.19/Inter-SemiBold.woff2"
+      as="font"
+      type="font/woff2"
+      crossorigin
+    />
+    <link
+      rel="preload"
+      href="fonts/inter-v3.19/Inter-Regular.woff2"
+      as="font"
+      type="font/woff2"
+      crossorigin
+    />
+    <link
+      rel="preload"
+      href="fonts/inter-v3.19/Inter-Medium.woff2"
+      as="font"
+      type="font/woff2"
+      crossorigin
     />
+    <link rel="preload" href="images/signal-logo.svg" as="image" crossorigin />
 
     <link
       href="node_modules/sanitize.css/sanitize.css"

fonts/InterVariable.woff2

@@ -3,7 +3,41 @@
 
 @font-face {
   font-family: 'Inter';
-  src: url('../fonts/InterVariable.woff2');
+  src: url('../fonts/inter-v3.19/Inter-BoldItalic.woff2');
+  font-weight: bolder;
+  font-style: italic;
+}
+@font-face {
+  font-family: 'Inter';
+  src: url('../fonts/inter-v3.19/Inter-Bold.woff2');
+  font-weight: bolder;
+}
+
+@font-face {
+  font-family: 'Inter';
+  src: url('../fonts/inter-v3.19/Inter-SemiBoldItalic.woff2');
+  font-weight: bold;
+  font-style: italic;
+}
+@font-face {
+  font-family: 'Inter';
+  src: url('../fonts/inter-v3.19/Inter-Italic.woff2');
+  font-style: italic;
+}
+@font-face {
+  font-family: 'Inter';
+  src: url('../fonts/inter-v3.19/Inter-SemiBold.woff2');
+  font-weight: bold;
+}
+@font-face {
+  font-family: 'Inter';
+  src: url('../fonts/inter-v3.19/Inter-Medium.woff2');
+  font-weight: 500;
+}
+
+@font-face {
+  font-family: 'Inter';
+  src: url('../fonts/inter-v3.19/Inter-Regular.woff2');
 }
 
 @font-face {