chore: update flake.lock (#1307)

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": 1778672786,
-        "narHash": "sha256-Blg88K1jwG+P0Mr27+rKMFCufdrWkV3wWh9AdYtz0FQ=",
+        "lastModified": 1778869304,
+        "narHash": "sha256-30sZNZoA1cqF5JNO9fVX+wgiQYjB7HJqqJ4ztCDeBZE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "eef00dfd8a712b34af845f9350bac681b1228bd1",
+        "rev": "d233902339c02a9c334e7e593de68855ad26c4cb",
         "type": "github"
       },
       "original": {