Adding explicit TOC header

Author: jruaux

README.adoc

@@ -5,6 +5,7 @@
 :project-version: 0.3.3
 :name:            Redis SQL Trino
 :toc:
+:toc-title:
 :toc-placement!:
 
 ++++
@@ -29,6 +30,8 @@ Trino is a distributed SQL engine designed to query large data sets across one o
 Though Trino does support a https://trino.io/docs/current/connector/redis.html[Redis OSS connector], this connector is limited to SCAN and subsequent HGET operations, which do not scale well in high-throughput scenarios.
 However, that is where {name} shines since it can push the entire query to the data atomically. This eliminates the waste of many network hops and subsequent operations.
 
+[discrete]
+== Table of Contents
 toc::[]
 
 == Background