refactor(update-script): Switch from nvfetcher to nix-update

pkgs/crowdsec/firewall-bouncer.nix

@@ -1,6 +1,6 @@
 {
   lib,
-  sources,
+  fetchFromGitHub,
   buildGoModule,
   envsubst,
   coreutils,
@@ -8,8 +8,16 @@
 let
   envsubstBin = lib.getExe envsubst;
 in
-buildGoModule {
-  inherit (sources.crowdsec-firewall-bouncer) pname version src;
+buildGoModule (drv: {
+  pname = "crowdsec-firewall-bouncer";
+  version = "0.0.34";
+
+  src = fetchFromGitHub {
+    owner = "crowdsecurity";
+    repo = "cs-firewall-bouncer";
+    rev = drv.version;
+    hash = "sha256-lDO9pwPkbI+FDTdXBv03c0p8wbkRUiIDNl1ip3AZo2g=";
+  };
 
   vendorHash = "sha256-SbpclloBgd9vffC0lBduGRqPOqmzQ0J91/KeDHCh0jo=";
 
@@ -23,4 +31,4 @@ buildGoModule {
     substituteInPlace $out/lib/systemd/system/crowdsec-firewall-bouncer.service \
       --replace-fail /bin/sleep ${coreutils}/bin/sleep
   '';
-}
+})