docs: update API docs (#1544)

remove admonition with link to old docs
fix link to pagination

Author: TC-MO

apify-api/openapi/openapi.yaml

@@ -3,10 +3,6 @@ info:
   title: Apify API
   description: |
 
-    > **UPDATE 2025-01-14:**
-    > We have rolled out this new Apify API Documentation. In case of any issues, please [report here](https://github.com/apify/apify-docs/issues).
-    > The old API Documentation is still [available here](https://docs.apify.com/api/v2-old).
-
     The Apify API (version 2) provides programmatic access to the [Apify
     platform](https://docs.apify.com). The API is organized
     around [RESTful](https://en.wikipedia.org/wiki/Representational_state_transfer)

apify-api/openapi/paths/key-value-stores/key-value-stores@{storeId}@keys.yaml

@@ -7,7 +7,7 @@ get:
     well as some information about the values (e.g. size).
 
     This endpoint is paginated using `exclusiveStartKey` and `limit` parameters
-    - see [Pagination](#/introduction/response-structure) for more details.
+    - see [Pagination](/api/v2#using-key) for more details.
   operationId: keyValueStore_keys_get
   security:
     - apiKeyStoreId: []