Update for redisvl 0.6.0 (#1524)

Co-authored-by: redisdocsapp[bot] <177626021+redisdocsapp[bot]@users.noreply.github.com>

Author: github-actions[bot]

content/integrate/redisvl/api/_index.md

@@ -47,9 +47,11 @@ Reference documentation for the RedisVL API.
   * [VoyageAIReranker](reranker/#voyageaireranker)
 * [LLM Cache](cache/)
   * [SemanticCache](cache/#semanticcache)
-* [LLM Session Manager](session_manager/)
-  * [SemanticSessionManager](session_manager/#semanticsessionmanager)
-  * [StandardSessionManager](session_manager/#standardsessionmanager)
+* [Embeddings Cache](cache/#embeddings-cache)
+  * [EmbeddingsCache](cache/#embeddingscache)
+* [LLM Message History](message_history/)
+  * [SemanticMessageHistory](message_history/#semanticmessagehistory)
+  * [MessageHistory](message_history/#messagehistory)
 * [Semantic Router](router/)
   * [Semantic Router](router/#semantic-router-api)
   * [Routing Config](router/#routing-config)