fix: Improper TOC nesting in main README (#175)

README.md

@@ -7,17 +7,17 @@
 
 # Table of Contents <!-- omit in toc -->
 - [Installation](#installation)
-  - [Main Classes](#main-classes)
-    - [Connection](#connection)
-      - [Transports](#transports)
-        - [idb-connector](#idb-connector)
-        - [REST](#rest)
-        - [SSH](#ssh)
-        - [ODBC](#odbc)
-    - [ProgramCall](#programcall)
-      - [Example](#example)
-    - [CommandCall](#commandcall)
-      - [Example](#example-1)
+- [Main Classes](#main-classes)
+  - [Connection](#connection)
+    - [Transports](#transports)
+      - [idb-connector](#idb-connector)
+      - [REST](#rest)
+      - [SSH](#ssh)
+      - [ODBC](#odbc)
+  - [ProgramCall](#programcall)
+    - [Example](#example)
+  - [CommandCall](#commandcall)
+    - [Example](#example-1)
   - [Utility Toolkit Functions](#utility-toolkit-functions)
 - [Documentation](#documentation)
 - [Testing](#testing)