fix(package): use ffmpeg_7 to provide missing audio codecs (#177)

Closes https://github.com/0xc000022070/zen-browser-flake/issues/175.

Co-authored-by: Cezary Drożak <cezary@drozak.net>

package.nix

@@ -7,7 +7,7 @@
   config,
   wrapGAppsHook3,
   autoPatchelfHook,
-  ffmpeg,
+  ffmpeg_7,
   alsa-lib,
   curl,
   dbus-glib,
@@ -197,7 +197,7 @@ in
       alsa-lib
       dbus-glib
       libXtst
-      ffmpeg
+      ffmpeg_7
     ];
 
     runtimeDependencies = lib.optionals stdenv.hostPlatform.isLinux [
@@ -217,7 +217,7 @@ in
 
     preFixup = ''
       gappsWrapperArgs+=(
-        --prefix LD_LIBRARY_PATH : "${lib.makeLibraryPath [ffmpeg]}"
+        --prefix LD_LIBRARY_PATH : "${lib.makeLibraryPath [ffmpeg_7]}"
         --add-flags "--name=''${MOZ_APP_LAUNCHER:-${binaryName}}"
         --add-flags "--class=''${MOZ_APP_LAUNCHER:-${binaryName}}"
       )