Updated ToC

Author: mike-schenk

README.md

@@ -5,16 +5,15 @@ This action sets environment variables, (and optionally step outputs), to differ
 ## Index <!-- omit in toc -->
 
 - [Inputs](#inputs)
-  - [Environment Variables](#environment-variables)
 - [Outputs](#outputs)
 - [Usage Examples](#usage-examples)
   - [Usage Instructions](#usage-instructions)
-    - [`key-name`](#key-name)
-    - [`scope-array`](#scope-array)
-    - [`key-value`](#key-value)
+    - [_`key-name`_](#key-name)
+    - [_`scope-array`_](#scope-array)
+    - [_`key-value`_](#key-value)
+    - [Input Environment Variables](#input-environment-variables)
     - [Input File Format](#input-file-format)
     - [`error-on-no-match`](#error-on-no-match)
-    - [Repository Secrets](#repository-secrets)
 - [Contributing](#contributing)
   - [Recompiling](#recompiling)
   - [Incrementing the Version](#incrementing-the-version)