flake: update nixpkgs inputs

Flake lock file updates:

• Updated input 'nixpkgs-stable':
    'github:NixOS/nixpkgs/6da4bc6cb07cba1b8e53d139cbf1d2fb8061d967' (2023-07-21)
  → 'github:NixOS/nixpkgs/ac1acba43b2f9db073943ff5ed883ce7e8a40a2c' (2023-07-23)

1 files changed, 3 insertions, 3 deletions

diff --git a/flake.lock b/flake.lock
index ab35785..e669394 100644
--- a/flake.lock
+++ b/flake.lock
@@ -361,11 +361,11 @@
     },
     "nixpkgs-stable": {
       "locked": {
-        "lastModified": 1689956312,
-        "narHash": "sha256-NV9yamMhE5jgz+ZSM2IgXeYqOvmGIbIIJ+AFIhfD7Ek=",
+        "lastModified": 1690148897,
+        "narHash": "sha256-l/j/AX1d2K79EWslwgWR2+htkzCbtjKZsS5NbWXnhz4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "6da4bc6cb07cba1b8e53d139cbf1d2fb8061d967",
+        "rev": "ac1acba43b2f9db073943ff5ed883ce7e8a40a2c",
         "type": "github"
       },
       "original": {