fix: Toc active Element (#2904)

* fix: Toc active Element

* chore(deps): bump up Elments-dev-portal & core versions.

* fix: update the findMatchingItems function

* fix: added types to findMatchingItems

* fix: added Unit cases.

Author: SB-venkatyadavilli

packages/elements-core/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@stoplight/elements-core",
-  "version": "9.0.16",
+  "version": "9.0.17",
   "sideEffects": [
     "web-components.min.js",
     "src/web-components/**",