chore: nix flake update

Signed-off-by: Lander Van den Bulcke <landervandenbulcke@gmail.com>

flake.lock

@@ -527,11 +527,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1758427187,
-        "narHash": "sha256-pHpxZ/IyCwoTQPtFIAG2QaxuSm8jWzrzBGjwQZIttJc=",
+        "lastModified": 1758690382,
+        "narHash": "sha256-NY3kSorgqE5LMm1LqNwGne3ZLMF2/ILgLpFr1fS4X3o=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "554be6495561ff07b6c724047bdd7e0716aa7b46",
+        "rev": "e643668fd71b949c53f8626614b21ff71a07379d",
         "type": "github"
       },
       "original": {
@@ -575,11 +575,11 @@
     },
     "nixpkgs_4": {
       "locked": {
-        "lastModified": 1758589230,
-        "narHash": "sha256-zMTCFGe8aVGTEr2RqUi/QzC1nOIQ0N1HRsbqB4f646k=",
+        "lastModified": 1758791193,
+        "narHash": "sha256-F8WmEwFoHsnix7rt290R0rFXNJiMbClMZyIC/e+HYf0=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "d1d883129b193f0b495d75c148c2c3a7d95789a0",
+        "rev": "25e53aa156d47bad5082ff7618f5feb1f5e02d01",
         "type": "github"
       },
       "original": {
@@ -661,11 +661,11 @@
         "pre-commit-hooks": "pre-commit-hooks"
       },
       "locked": {
-        "lastModified": 1758789730,
-        "narHash": "sha256-WTMspAJgASXMODTwhPiSMClxAPs8xvlD53yLsIWSaqs=",
+        "lastModified": 1759011566,
+        "narHash": "sha256-mjzcNHUeNY4z/BrWjquYO4zAjox6ofDykZms/BFb8Iw=",
         "ref": "refs/heads/main",
-        "rev": "7a4610e238268c71fc4ccb3bebeb1e11ed9e8db1",
-        "revCount": 163,
+        "rev": "f5e3901c0883685055441803bfdf378fbaa0fe85",
+        "revCount": 166,
         "type": "git",
         "url": "https://git.escapeangle.com/lander/nixvim.git"
       },