flake.lock: Update

Flake lock file updates:

• Updated input 'fish':
'github:fish-shell/fish-shell/1f6cd5fc2d090c3666207d014cf337519716b73a' (2025-09-30)
→ 'github:fish-shell/fish-shell/3fa252677a26d429f3259a4af4ab3cfe2472ca8d' (2025-10-07)
• Updated input 'gleam-nix/rust-manifest':
'https://static.rust-lang.org/dist/channel-rust-1.85.0.toml?narHash=sha256-irgHsBXecwlFSdmP9MfGP06Cbpca2QALJdbN4cymcko%3D'
→ 'https://static.rust-lang.org/dist/channel-rust-1.88.0.toml?narHash=sha256-YZfjbpqCYQFG1qLl2zMyFq2nFwmB2aFo5DSOCaBtGLY%3D'

flake.lock

···
     "fish": {
       "flake": false,
       "locked": {
-        "lastModified": 1759253233,
-        "narHash": "sha256-3VwDwRjYo9/ifkl2Vt9pTmLabt+XyS0FXi0el+YgC/A=",
+        "lastModified": 1759870566,
+        "narHash": "sha256-oNRC1NWYE0LEK2a/7nHtlmp20f8hn/1FZgaySqzwSbg=",
         "owner": "fish-shell",
         "repo": "fish-shell",
-        "rev": "1f6cd5fc2d090c3666207d014cf337519716b73a",
+        "rev": "3fa252677a26d429f3259a4af4ab3cfe2472ca8d",
         "type": "github"
       },
       "original": {
         "owner": "fish-shell",
-        "ref": "4.1.1",
+        "ref": "4.1.2",
         "repo": "fish-shell",
         "type": "github"
       }
···
     "rust-manifest": {
       "flake": false,
       "locked": {
-        "narHash": "sha256-irgHsBXecwlFSdmP9MfGP06Cbpca2QALJdbN4cymcko=",
+        "narHash": "sha256-YZfjbpqCYQFG1qLl2zMyFq2nFwmB2aFo5DSOCaBtGLY=",
         "type": "file",
-        "url": "https://static.rust-lang.org/dist/channel-rust-1.85.0.toml"
+        "url": "https://static.rust-lang.org/dist/channel-rust-1.88.0.toml"
       },
       "original": {
         "type": "file",