Updated Installation (markdown)

Installation.md

@@ -121,7 +121,7 @@ $ docker run --entrypoint /opt/kcc/kcc-c2p.py --rm -v "$(pwd):/app" ghcr.io/ciro
 ```
 
 
-### INSTALL FROM SOURCES
+## INSTALL FROM SOURCES
 
 Easiest to use [GitHub Desktop](https://desktop.github.com) to clone the KCC repo. From GitHub Desktop, open a Command Prompt (Windows)/Terminal (Mac) window in the repo. 
 
@@ -129,7 +129,7 @@ Depending on your system [Python](https://www.python.org) may be called either `
 
 We recommend using [virtual environments](https://docs.python.org/3/tutorial/venv.html) to manage dependencies. (Optional: A code editor like [VS Code](https://code.visualstudio.com) will automatically re-activate virtual environments.)
 
-#### Windows
+### Windows
 
 One time setup and running for the first time:
 ```
@@ -146,7 +146,7 @@ venv\Scripts\activate.bat
 python kcc.py
 ```
 
-#### Mac
+### Mac
 
 One time setup and running for the first time:
 ```
@@ -163,7 +163,7 @@ source venv/bin/activate
 python kcc.py
 ```
 
-#### Linux
+### Linux
 
 _Originally posted by @hhtien1408 in https://github.com/ciromattia/kcc/issues/438#issuecomment-1281159452_