docs: add new admonition to index.md within integrations/actors (#1074)

added new admonition with link to Store presenting Apify's catalogue of
Integration Actors

Author: TC-MO

sources/platform/integrations/actors/index.md

@@ -11,6 +11,12 @@ slug: /integrations/actors
 
 ---
 
+:::note Integration Actors
+
+You can check out a catalogue of our Integaration Actors within [Apify Store](https://apify.com/store/categories/integrations).
+
+:::
+
 Actor integrations provide a way to connect your Actors with other Actors or tasks easily. They provide a new level of flexibility, as adding a new integration simply means creating [integration-ready Actors](/platform/integrations/actors/integration-ready-actors). Thus, new integrations can be created by the community itself.
 
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