Services/Kopia: Update to v0.20.1

system/services/kopia.nix

@@ -4,7 +4,7 @@
   pkgs,
   ...
 }: let
-  kopiaVersion = "latest";
+  kopiaVersion = "0.20.1";
 in {
   # If we need to pass secrets to containers we can't use plain env variables.
   sops.templates."kopia_secrets.env".content = ''
@@ -97,9 +97,6 @@ in {
         "--disable-csrf-token-checks"
         "--insecure"
         "--address=0.0.0.0:51515"
-        # TODO: How to set this?
-        # "--server-username=(cat ${config.sops.secrets.kopia-server-username.path})"
-        # "--server-password=(cat ${config.sops.secrets.kopia-server-password.path})"
       ];
 
       extraOptions = [