chore(lock): bump nomarchy-wallpapers a716cf6 → d4f5fbf

The wallpapers repo's 'updates' commit gave each of the three v1 pair
themes a second background (1-/2-<slug>.png, replacing the single
ember-kiln/clay-kiln era files), but this lock still pinned the
one-wallpaper rev — downstream machines re-lock the transitive
nomarchy-wallpapers input from *this* lock, so SUPER+SHIFT+T
('bg next') cycled a one-item list and visibly did nothing
(hardware report, kiln-clay, 2026-07-18).

Targeted bump of the wallpapers input only — runtime-only content,
never read at eval (see flake.nix). Verified: pkgs.nomarchy-default-themes
builds, which runs the per-slug drift check (every theme json still has a
non-empty backgrounds/), and kiln + kiln-clay now list two files each.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

flake.lock

@@ -215,11 +215,11 @@
     "nomarchy-wallpapers": {
       "flake": false,
       "locked": {
-        "lastModified": 1784374559,
-        "narHash": "sha256-c05z+PUFbX3gZ7CQfFHtVCWI5WlNCAcFQBC/bBv7G+Y=",
+        "lastModified": 1784377824,
+        "narHash": "sha256-XPzT9w+xr0bEn3W2R+pYo4z10hKT1E10QB5TAu/UrIM=",
         "ref": "main",
-        "rev": "a716cf60a05f187ad1d8baa043dda4e6085c2463",
-        "revCount": 3,
+        "rev": "d4f5fbfff2228c7725be5a1adbc9b325621d3c94",
+        "revCount": 4,
         "type": "git",
         "url": "https://git.bemagri.xyz/bernardo/Nomarchy-Wallpapers.git"
       },