Update DOSEMU installation instructions in README for better clarity

readme.md

@@ -70,6 +70,12 @@ The project is organized into modular assembly files:
 ### Option 2: Using DOSEMU (Linux)
 
 1. **Install DOSEMU**:
+    ```bash
+        sudo add-apt-repository ppa:dosemu2/ppa
+        sudo apt update
+        sudo apt install dosemu2
+    ```
+    # For older versions, you might need:
     ```bash
         sudo apt-get install dosemu
     ```