fix(insight): literally just a single character! (#4841)

### fix(insight): facet manager bindings error on disconnect callback

[SVCC-4338](https://coveord.atlassian.net/browse/SVCC-4338)

There was an error if you add the component to the DOM and then remove
it **without** calling initialize on the search interface, since
bindings are undefined, so I added an optional chaining operator on the
facet manager disconnect callback to not have an error!

It was not a big deal but mostly annoying in ServiceNow since it
displayed a huge error toast on the client side 😓

[SVCC-4338]:
https://coveord.atlassian.net/browse/SVCC-4338?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Co-authored-by: Louis Bompart <[email protected]>

packages/atomic/src/components/search/atomic-facet-manager/atomic-facet-manager.tsx

@@ -105,7 +105,7 @@ export class AtomicFacetManager implements InitializableComponent {
   }
 
   disconnectedCallback() {
-    this.bindings.i18n.off('languageChanged', this.sortFacets);
+    this.bindings?.i18n.off('languageChanged', this.sortFacets);
   }
 
   public render() {