fix: normalise the non-breaking space in Fused Dimensions

The note's filename and title carried U+00A0 rather than a plain space. That was
the faithful original - the mojibake repair reversed to it correctly - but it is
a scrape artefact, not an authored name: nobody titles a hack with a
non-breaking space, and an invisible character in a filename is the same class
of trap as the mojibake itself, since it silently breaks greps and hand-typed
wikilinks.

No URL impact. NFKD folds U+00A0 to a plain space, so slugifyStem already
produced 'fused-dimensions' either way; the published URL is unchanged.

Renamed the note, replaced both in-file occurrences (the title field and the H1)
and regenerated, so the MOC wikilinks now use a plain space too. Verified no
filename, catalog stem or catalog title anywhere still contains U+00A0.

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

wiki/catalog.json

@@ -7864,8 +7864,8 @@
       ]
     },
     {
-      "stem": "Fused Dimensions",
-      "title": "Pokémon Fused Dimensions",
+      "stem": "Fused Dimensions",
+      "title": "Pokémon Fused Dimensions",
       "platform": "GBA",
       "base": "FireRed",
       "version": null,