Resource configurations: Improve no-configs page

- Fix a typo s/specifc/specific/
- Add third variant why no documentation about platform-specific
  configuration settings is provided, by referring to vendor
  documentation pages

website/docs/reference/resource-configs/no-configs.md

@@ -1,11 +1,12 @@
 ---
-title: "No specifc configurations for this Adapter"
+title: "No specific configurations for this adapter"
 id: "no-configs"
 ---
 
 If you were guided to this page from a data platform setup article, it most likely means:
 
 - Setting up the profile is the only action the end-user needs to take on the data platform, or
-- The subsequent actions the end-user needs to take are not currently documented
+- The subsequent actions the end-user needs to take are not currently documented, or
+- Relevant information is provided on the documentation pages of the data platform vendor.
 
 If you'd like to contribute to data platform-specific configuration information, refer to [Documenting a new adapter](/guides/adapter-creation)