Update README.md

Author: ReneWerner87

README.md

@@ -2,7 +2,7 @@
 
 This website is built using [Docusaurus 3](https://docusaurus.io/), a modern static website generator.
 
-### Installation
+## Installation
 
 ```
 $ yarn
@@ -16,15 +16,15 @@ $ yarn start
 
 This command starts a local development server and opens up a browser window. Most changes are reflected live without having to restart the server.
 
-### Build
+## Build
 
 ```
 $ yarn build
 ```
 
 This command generates static content into the `build` directory and can be served using any static contents hosting service.
 
-### Deployment
+## Deployment
 
 Using SSH: