Added alternative activation command for Windows

Added alternative for venv activation in Windows.
It's only a single comannd - the rest of the flow remains the same.

Author: filipkappa

README.md

@@ -40,6 +40,11 @@ and activate it with:
 ```bash
 source .venv/bin/activate
 ```
+alternative activation for Windows:
+
+```bash
+.\.venv\Scripts\Activate
+```
 
 Install the dependencies: