docs: changed links

README.md

@@ -4,14 +4,14 @@ files quickly and efficiently.
 
 Because it uses ffmpeg under the hood, it supports any media file processing that ffmpeg can handle.
 
-1. [Installation](#-installation)
-2. [Usage](#-usage)
+1. [Installation](#installation-)
+2. [Usage](#usage-)
    - [Practical examples](#more-practical-examples)
-3. [Requirements](#-requirements)
-4. [All available options](#-available-options)
-5. [License](#-license)
+3. [Requirements](#requirements-)
+4. [All available options](#available-options-)
+5. [License](#license-)
 
-### 💻 Installation
+### Installation 💻
 
 #### [Homebrew](https://brew.sh) (macOS / Linux)
 
@@ -58,7 +58,7 @@ The ffzap executable will be under `target/release/`
 
 and add it to your path.
 
-### ⌨️ Usage
+### Usage ⌨️
 
 ffzap's usage is almost identical to ffmpeg, consider this simple example:
 
@@ -159,13 +159,13 @@ Keypoints:
 
 </details>
 
-### ⚙️ Requirements
+### Requirements ⚙️
 
 - a working installation of [ffmpeg](https://ffmpeg.org/download.html)
 - (just for installing / building via Cargo) a working installation of
   the [Rust programming language](https://www.rust-lang.org/tools/install)
 
-### 🔧 Available options
+### Available options 🔧
 
 <details>
   <summary>Click here to expand section</summary>
@@ -222,7 +222,7 @@ Options:
 
 </details>
 
-### ⚖️ License
+### License ⚖️
 
 You are free to: