build(deps): drop the adm-zip overrides pin - upstream ranges now reach 0.6.0 (#72)

Both upstream gates from #58 have cleared since it was filed:

  firefox-profile@4.7.1  → adm-zip ~0.6.x   (was ~0.5.x)
  web-ext@10.6.0         → firefox-profile 4.7.1 (was exact 4.7.0)

adm-zip latest is 0.6.0, so firefox-profile's own ~0.6.x range now
resolves the patched 0.6.0 without the forced override. Removing the
adm-zip entry leaves resolution byte-identical: `npm install
--package-lock-only` produces no lockfile change and the tree still
resolves adm-zip@0.6.0. The brace-expansion / shell-quote overrides are
unrelated and stay.

Verified locally: npm ci (exit 0), npm run build, node build.js validate
(chrome+firefox pass), node test-extension.js, npx web-ext lint (0 errors).
GHSA-xcpc-8h2w-3j85 no longer appears in npm audit.

Closes #58.

Co-authored-by: aaronjmars <aaronjmars@users.noreply.github.com>

opendia-extension/package.json

@@ -26,7 +26,6 @@
     "web-ext": "^10.6.0"
   },
   "overrides": {
-    "adm-zip": "^0.6.0",
     "brace-expansion": "^1.1.16",
     "shell-quote": "^1.9.0"
   }