fira-mono: 4.106 -> 4.202

Also fix incorrect version in package name.

pkgs/data/fonts/fira-mono/default.nix

@@ -1,13 +1,14 @@
 { lib, fetchzip }:
 
-fetchzip {
-  name = "fira-mono-3.206";
+let version = "4.202";
+in fetchzip {
+  name = "fira-mono-${version}";
 
-  url = "https://github.com/mozilla/Fira/archive/4.106.zip";
+  url = "https://github.com/mozilla/Fira/archive/${version}.zip";
 
   postFetch = ''
     mkdir -p $out/share/fonts
-    unzip -j $downloadedFile Fira-4.106/otf/FiraMono\*.otf -d $out/share/fonts/opentype
+    unzip -j $downloadedFile Fira-${version}/otf/FiraMono\*.otf -d $out/share/fonts/opentype
   '';
 
   sha256 = "1ci3fxhdwabvfj4nl16pwcgqnh7s2slp8vblribk8zkpx8cbp1dj";