docs/flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs':
'github:NixOS/nixpkgs/fe416aaedd397cacb33a610b33d60ff2b431b127' (2026-03-12)
→ 'github:NixOS/nixpkgs/c06b4ae3d6599a672a6210b7021d699c351eebda' (2026-03-13)
• Updated input 'tgirlpkgs':
'path:../.?lastModified=0&narHash=sha256-twhFe/UsHPvLLAPDa7QJ0WQ08mSz84mOh8BOvHualos%3D' (1970-01-01)
→ 'path:../.?lastModified=0&narHash=sha256-t/FJZlACl%2B609IDNJzZZlMxbMp1b7dcAGh3gC10kbMg%3D' (1970-01-01)
• Updated input 'tgirlpkgs/nixpkgs':
'https://releases.nixos.org/nixpkgs/nixpkgs-26.05pre961788.75690239f08f/nixexprs.tar.xz?lastModified=1773231277&narHash=sha256-p0h/nSeqzIkbn/2uFC4keoIPwmqXGHsX0gkCXM7km00%3D&rev=75690239f08f885ca9b0267580101f60d10fbe62' (2026-03-11)
→ 'https://releases.nixos.org/nixpkgs/nixpkgs-26.05pre963303.f82ce7af0b79/nixexprs.tar.xz?lastModified=1773476965&narHash=sha256-pUpbgKKT6FLo43tTJh3KokVpVV1nyVf4J2f58N0pGNY%3D&rev=f82ce7af0b79ac154b12e27ed800aeb97413723c' (2026-03-14)

docs/flake.lock

···
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1773282481,
-        "narHash": "sha256-b/GV2ysM8mKHhinse2wz+uP37epUrSE+sAKXy/xvBY4=",
+        "lastModified": 1773389992,
+        "narHash": "sha256-wvfdLLWJ2I9oEpDd9PfMA8osfIZicoQ5MT1jIwNs9Tk=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "fe416aaedd397cacb33a610b33d60ff2b431b127",
+        "rev": "c06b4ae3d6599a672a6210b7021d699c351eebda",
         "type": "github"
       },
       "original": {
···
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1773231277,
-        "narHash": "sha256-p0h/nSeqzIkbn/2uFC4keoIPwmqXGHsX0gkCXM7km00=",
-        "rev": "75690239f08f885ca9b0267580101f60d10fbe62",
+        "lastModified": 1773476965,
+        "narHash": "sha256-pUpbgKKT6FLo43tTJh3KokVpVV1nyVf4J2f58N0pGNY=",
+        "rev": "f82ce7af0b79ac154b12e27ed800aeb97413723c",
         "type": "tarball",
-        "url": "https://releases.nixos.org/nixpkgs/nixpkgs-26.05pre961788.75690239f08f/nixexprs.tar.xz?lastModified=1773231277&rev=75690239f08f885ca9b0267580101f60d10fbe62"
+        "url": "https://releases.nixos.org/nixpkgs/nixpkgs-26.05pre963303.f82ce7af0b79/nixexprs.tar.xz?lastModified=1773476965&rev=f82ce7af0b79ac154b12e27ed800aeb97413723c"
       },
       "original": {
         "type": "tarball",
···
       },
       "locked": {
         "lastModified": 0,
-        "narHash": "sha256-twhFe/UsHPvLLAPDa7QJ0WQ08mSz84mOh8BOvHualos=",
+        "narHash": "sha256-t/FJZlACl+609IDNJzZZlMxbMp1b7dcAGh3gC10kbMg=",
         "path": "../.",
         "type": "path"
       },