build(hachidori): bump fork to upstream 6faca95

Upstream dropped Firefox, so the overlay copy now turns off custom JavaScript
from its plain capability flag. The Anki audio fixture follows the removal of
media capture options.

scripts/hachidori-anki-audio.test.ts

@@ -90,7 +90,7 @@ async function mine({ proxy = true, audioFails = false } = {}) {
       audioSources: [
         { id: 'test', enabled: true, type: 'custom', url: 'https://example.test/{term}' },
       ],
-      mediaCapture: { enabled: false },
+      experimental: {},
     }),
     readDictionaries: async () => [],
     engine: async () => ({ ready: true, loading: false, generation: 1 }),