fix(deps): update dependency slug to v9

Author: renovate[bot]

package-lock.json

@@ -101,7 +101,7 @@
     "mitt": "^3.0.1",
     "path-normalize": "^6.0.13",
     "proxy-polyfill": "^0.3.2",
-    "slug": "^8.2.3",
+    "slug": "^9.0.0",
     "tippy.js": "^6.3.7",
     "uuid": "^9.0.1",
     "vue": "^2.7.16",