update table of contents

Author: EskiMojo14

README.md

@@ -88,6 +88,10 @@ console.log(selectTotal(exampleState)) // { total: 2.322 }
     - [Customize `equalityCheck` for `defaultMemoize`](#customize-equalitycheck-for-defaultmemoize)
     - [Use memoize function from Lodash for an unbounded cache](#use-memoize-function-from-lodash-for-an-unbounded-cache)
   - [createStructuredSelector({inputSelectors}, selectorCreator = createSelector)](#createstructuredselectorinputselectors-selectorcreator--createselector)
+- [Development-only checks](#development-only-checks)
+  - [`inputStabilityCheck`](#inputstabilitycheck)
+    - [Global configuration](#global-configuration)
+    - [Per-selector configuration](#per-selector-configuration)
 - [FAQ](#faq)
   - [Q: Why isn’t my selector recomputing when the input state changes?](#q-why-isnt-my-selector-recomputing-when-the-input-state-changes)
   - [Q: Why is my selector recomputing when the input state stays the same?](#q-why-is-my-selector-recomputing-when-the-input-state-stays-the-same)