Pin fuse.js to ~7.2.0 — v7.3.0 dropped the UMD build needed for Hugo's script concatenation

fuse.js 7.3.0 removed dist/fuse.min.js (UMD), shipping only ESM/CJS.
Since Hugo concatenates vendor JS into a plain <script> tag, the ESM
export syntax causes a runtime error and breaks search. Pin to 7.2.0,
the last version with UMD support.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -39,7 +39,7 @@
     "@tailwindcss/cli": "^4.2.2",
     "@tailwindcss/typography": "^0.5.19",
     "chart.js": "^4.5.1",
-    "fuse.js": "^7.3.0",
+    "fuse.js": "~7.2.0",
     "katex": "^0.16.45",
     "lite-youtube-embed": "^0.3.4",
     "medium-zoom": "^1.1.0",