Update README.md

smaller headers

README.md

@@ -92,18 +92,18 @@ It is of course possible to use cat_win on Linux or MacOS, aswell as Windows!
 
 ### Prerequisites
 
-#### `Python-Package`
+##### `Python-Package`
 Using cat_win as a Python-Package demands a Python-Interpreter (>= 3.7).
 
-#### `Binary Executable`
+##### `Binary Executable`
 Using cat_win as a binary executable demands no prerequisites, hereby the stand-alone executables are sufficient.
 
 <div id="installation"></div>
 
 ### Installation
 [![Version][CurrentVersion]](https://pypi.org/project/cat-win/)
 
-#### `Python-Package`
+##### `Python-Package`
 Simply install the python package (via [PyPI-cat_win](https://pypi.org/project/cat-win/)):
 ```console
 python -m pip install --upgrade cat_win[clip]
@@ -121,7 +121,7 @@ In this case you can try to fix the problem by installing the cat_win-package wi
 This fix will use the [colorama](https://pypi.org/project/colorama/) module
 which can also be installed after the fact to patch the problem.
 
-#### `Binary Executable`
+##### `Binary Executable`
 **OR alternatively** you can use the (standalone) binary executable version:
 
 Download: