docs: sort install options by system

README.md

@@ -24,7 +24,7 @@ macOS and Windows._**
 
 [![Screencast](https://user-images.githubusercontent.com/11071876/189767585-8bc45c18-8392-411d-84dc-cef1cb5dbc47.gif)](https://raw.githubusercontent.com/dynobo/normcap/main/assets/normcap.gif)
 
-## Quickstart
+## Installation
 
 Pick **_one_** of the option below to install a prebuilt release. If you experience
 issues please look at the [FAQs](https://dynobo.github.io/normcap/#faqs) or
@@ -62,7 +62,7 @@ screenshots. ([#135](https://github.com/dynobo/normcap/issues/135))
   for M1. <small>Might be available delayed, as it is currently build manually. (Thx,
   [@Takrin](https://github.com/Takrin)!)</small>
 
-## Python package
+## Install Python package
 
 As an _alternative_ to a prebuilt package you can install the
 [NormCap Python package](https://pypi.org/project/normcap/) for **Python >=3.9**: