chore: regenerate slug-keyed manifests after the stem repair

banner-manifest.json and file-manifest.json are build outputs but are tracked,
and both key on the site slug, so the four changed slugs have to be re-emitted
or the next build shows a dirty tree. Content is otherwise identical - only the
four keys and their asset filenames move.

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

src/generated/file-manifest.json

@@ -141,7 +141,7 @@
       "kind": "guide"
     }
   ],
-  "a-il": [
+  "anil": [
     {
       "label": "Pokemon Añil V2.09G English.rar",
       "url": "https://romhacks-files.ginnoir.com/Pokemon_A_il/Pokemon%20A%C3%B1il%20V2.09G%20English.rar",
@@ -2102,7 +2102,7 @@
       "kind": "guide"
     }
   ],
-  "yu-gi-oh-pok-duel": [
+  "yu-gi-oh-pokeduel": [
     {
       "label": "yugipkduel v4.0.6.zip",
       "url": "https://romhacks-files.ginnoir.com/Yu-Gi-Oh_Pok_Duel/yugipkduel%20v4.0.6.zip",