overlay: bump tailscale for stable hosts

overlays/default.nix

@@ -1,4 +1,25 @@
-{ self, config, pkgs, lib, isUnstable, ... }: {
+{ self, config, pkgs, lib, isUnstable, ... }:
+let
+  tailscale = self: super: {
+    tailscale = super.callPackage "${super.path}/pkgs/servers/tailscale" {
+      buildGoModule = args:
+        super.buildGo119Module (args // rec {
+          version = "1.34.2";
+          src = super.fetchFromGitHub {
+            owner = "tailscale";
+            repo = "tailscale";
+            rev = "v${version}";
+            sha256 = "sha256-uFr7swB7AQLvjDg+1KBCQuoLkDw454+gVe+6/iD74LM=";
+          };
+          vendorSha256 = "sha256-//qhvzZzaAqfcj4HZIy6ZkGyfAwtRdf7ARaXI+trTe0=";
+          ldflags = [
+            "-X tailscale.com/version.Long=${version}"
+            "-X tailscale.com/version.Short=${version}"
+          ];
+        });
+    };
+  };
+in {
   nixpkgs.overlays = if isUnstable then
     [
       (self: super: {
@@ -13,8 +34,8 @@
         });
       })
     ]
-  else
+  else [
-    [
+    tailscale
     (self: super: {
       matrix-synapse = super.matrix-synapse.overrideAttrs (old: rec {
         version = "1.74.0";