flake.nix: bump flake & build 1.22 go module

Resolve broken nix build due to us using Go 1.21 to build a 1.22 minimum
package.

Signed-off-by: Patrick O'Doherty <patrick@tailscale.com>

flake.lock

@@ -5,11 +5,11 @@
         "systems": "systems"
       },
       "locked": {
-        "lastModified": 1694529238,
-        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "lastModified": 1709126324,
+        "narHash": "sha256-q6EQdSeUZOG26WelxqkmR7kArjgWCdw5sfJVHPH/7j8=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "rev": "d465f4819400de7c8d874d50b982301f28a84605",
         "type": "github"
       },
       "original": {
@@ -20,11 +20,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1698553279,
-        "narHash": "sha256-T/9P8yBSLcqo/v+FTOBK+0rjzjPMctVymZydbvR/Fak=",
+        "lastModified": 1709101946,
+        "narHash": "sha256-TsySgcWm/GlbYdL3AEva49ceeI2BdPQ7muwfYNr1fwo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "90e85bc7c1a6fc0760a94ace129d3a1c61c3d035",
+        "rev": "d53c2037394da6fe98decca417fc8fda64bf2443",
         "type": "github"
       },
       "original": {

flake.nix

@@ -24,12 +24,12 @@
           pkgs = nixpkgs.legacyPackages.${prev.system};
         in
         rec {
-          golink = pkgs.buildGo121Module rec {
+          golink = pkgs.buildGo122Module rec {
             pname = "golink";
             version = golinkVersion;
             src = pkgs.nix-gitignore.gitignoreSource [ ] ./.;
 
-            vendorHash = "sha256-R/o3csZC/M9nm0k5STL7AhbG5J4LtdxqKaVjM/9ggW8="; # SHA based on vendoring go.mod
+            vendorHash = "sha256-8s0JadyA8IvfC6zGFJJHrKZHIwBxPLXDfbgy02unqz0="; # SHA based on vendoring go.mod
           };
         };
     }