docs(#5): update readme toc

Author: BlasiusSecundus

README.md

@@ -12,6 +12,7 @@
     - [Using Maven](#using-maven)
 - [Documentation](#documentation)
 - [Requirements and Downloads](#requirements-and-downloads)
+    - [Snapshots](#snapshots)
 - [Enable GraphQL Servlet](#enable-graphql-servlet)
 - [Enable Graph*i*QL](#enable-graphiql)
 - [Enable Altair](#enable-altair)
@@ -23,6 +24,12 @@
   - [Tabs](#tabs)
 - [Supported GraphQL-Java Libraries](#supported-graphql-java-libraries)
   - [GraphQL Java Tools](#graphql-java-tools)
+  - [GraphQL Annotations](#graphql-annotations)
+    - [Configuration](#configuration)
+    - [Root resolvers, directives, type extensions](#root-resolvers-directives-type-extensions)
+    - [Interfaces](#interfaces)
+    - [Custom scalars and type functions](#custom-scalars-and-type-functions)
+    - [Custom Relay and GraphQL Annotation Processor](#custom-relay-and-graphql-annotation-processor)
 - [Tracing and Metrics](#tracing-and-metrics)
   - [Usage](#usage)
 - [Contributions](#contributions)