chore(docs): update TOC

README.md

@@ -27,34 +27,34 @@ for me!*
 **Table of Contents**
 
 - [Installation](#installation)
-    - [Install from pip](#install-from-pip)
-    - [Install from source](#install-from-source)
+  - [Install from pip](#install-from-pip)
+  - [Install from source](#install-from-source)
 - [HOW TO USE](#how-to-use)
-    - [Quick Start](#quick-start)
-        - [Use `stone` in a GUI](#use-stone-in-a-gui)
-        - [Use `stone` in command line interface (CLI)](#use-stone-in-command-line-interface-cli)
-        - [Interpretation of the table](#interpretation-of-the-table)
-    - [Detailed Usage](#detailed-usage)
-        - [Use Cases](#use-cases)
-            - [1. Process multiple images](#1-process-multiple-images)
-            - [2. Specify color categories](#2-specify-color-categories)
-            - [3. Specify category labels](#3-specify-category-labels)
-            - [4. Specify output folder](#4-specify-output-folder)
-            - [5. Store report images for debugging](#5-store-report-images-for-debugging)
-            - [6. Specify the types of the input image(s)](#6-specify-the-types-of-the-input-images)
-            - [7. Convert the `color` images to `black/white` images](#7-convert-the-color-images-to-blackwhite-images)
-            - [8. Tune parameters of face detection](#8-tune-parameters-of-face-detection)
-            - [9. Multiprocessing settings](#9-multiprocessing-settings)
-            - [10. Used as a library by importing into other projects](#10-used-as-a-library-by-importing-into-other-projects)
+  - [Quick Start](#quick-start)
+    - [Use `stone` in a GUI](#use-stone-in-a-gui)
+    - [Use `stone` in command line interface (CLI)](#use-stone-in-command-line-interface-cli)
+    - [Interpretation of the table](#interpretation-of-the-table)
+  - [Detailed Usage](#detailed-usage)
+    - [Use Cases](#use-cases)
+      - [1. Process multiple images](#1-process-multiple-images)
+      - [2. Specify color categories](#2-specify-color-categories)
+      - [3. Specify category labels](#3-specify-category-labels)
+      - [4. Specify output folder](#4-specify-output-folder)
+      - [5. Store report images for debugging](#5-store-report-images-for-debugging)
+      - [6. Specify the types of the input image(s)](#6-specify-the-types-of-the-input-images)
+      - [7. Convert the `color` images to `black/white` images](#7-convert-the-color-images-to-blackwhite-images)
+      - [8. Tune parameters of face detection](#8-tune-parameters-of-face-detection)
+      - [9. Multiprocessing settings](#9-multiprocessing-settings)
+      - [10. Used as a library by importing into other projects](#10-used-as-a-library-by-importing-into-other-projects)
 - [Changelogs](#changelogs)
-    - [v1.2.0](#v120)
-    - [v1.1.3](#v113)
-    - [v1.1.2](#v112)
-    - [v1.1.1](#v111)
-    - [v1.1.0](#v110)
-    - [v1.0.1](#v101)
-    - [v1.0.0](#v100)
-    - [v0.2.0](#v020)
+  - [v1.2.0](#v120)
+  - [v1.1.3](#v113)
+  - [v1.1.2](#v112)
+  - [v1.1.1](#v111)
+  - [v1.1.0](#v110)
+  - [v1.0.1](#v101)
+  - [v1.0.0](#v100)
+  - [v0.2.0](#v020)
 - [Citation](#citation)
 - [Contributing](#contributing)
 - [Disclaimer](#disclaimer)