chore: update flake.lock (#1470)

Floatpane Bot created 

## What?

Updates `flake.lock` to the latest revisions of all flake inputs
(`nixpkgs`, `flake-utils`, etc.).

## Why?

Keeps Nix inputs current so contributors and CI build against fresh
`nixpkgs`. Picks up upstream security and toolchain fixes. Generated
automatically by the flake-lock update workflow on changes to `go.sum`.

Change summary

flake.lock | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

Detailed changes

flake.lock 🔗 

@@ -59,11 +59,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1780747962,
-        "narHash": "sha256-IX7G1dlKrOqPOImfbo7ADDfV5yU1+j+MRChI3TL4tAA=",
+        "lastModified": 1781359544,
+        "narHash": "sha256-iUuzKQcyXvopYDDzFpMK5eQKP3WIJExYny2kJtbgUcE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "cbb5cf358f50aa6acc9efd6113b7bcfbc352cd73",
+        "rev": "9f11f828c213641c2369a9f1fa31fe31557e3156",
         "type": "github"
       },
       "original": {