yuzuru/invidious: Enable auto-restarts

This is not the cleanest way to make it work reliably, but since this is
an upstream problem, I can’t do much else.

machines/yuzuru/services/invidious/default.nix

@@ -40,6 +40,10 @@
     extraSettingsFile = config.sops.secrets.invidious-extra-settings.path;
   };
 
+  systemd.services.invidious.serviceConfig = {
+    Restart = "on-failure";
+  };
+
   services.nginx.virtualHosts."iv.sbruder.xyz" = {
     locations = {
       "/robots.txt".return = "200 'User-agent: *\\nDisallow: /'";