Update README.md

Author: asus4

README.md

@@ -4,6 +4,9 @@ Displays iOS / Android native dialog from Unity.
 
 ## Install via UPM
 
-Add the following GitHub URL from the Package Manager UI
+![package-from-git](https://github.com/user-attachments/assets/45562439-5c37-4940-afe5-a5fb59eb6849)
 
+1. Open the Package Manager Window.
+2. Click `+` and select "Add package from git URL".
+3. Paste the following URL:  
 `https://github.com/asus4/UnityNativeDialogPlugin.git?path=/Packages/com.github.asus4.nativedialog#v1.1.0`