Update dependency flickity-fade to v2

Author: renovate[bot]

site/package.json

@@ -22,7 +22,7 @@
     "@thulite/seo": "^2.4.2",
     "animejs": "^4.2.2",
     "flickity": "^2.3.0",
-    "flickity-fade": "^1.0.0",
+    "flickity-fade": "^2.0.0",
     "headroom.js": "^0.12.0",
     "scroll-out": "^2.2.12",
     "swup": "^4.7.0",