fix: upstream Bootstrap bug in mobile menu toggle

Bootstrap error: TypeError: Cannot read properties of undefined (reading '_isTransitioning')

Resolved in Bootstrap v4.6.1

See https://discord.com/channels/722225264733716590/742863504515793149/967407603284078662

See https://github.com/twbs/bootstrap/releases/tag/v4.6.1

package.json

@@ -15,7 +15,7 @@
   "main": "index.js",
   "dependencies": {
     "@fortawesome/fontawesome-free": "^6.0.0",
-    "bootstrap": "^4.6.0",
+    "bootstrap": "^4.6.1",
     "headroom.js": "^0.12.0",
     "instant.page": "^5.1.0",
     "jquery": "^3.6.0",