Update README.md

add '--release' to the command so that the resulting file is much smaller.

README.md

@@ -7,7 +7,7 @@ A simple application to display the local computer name and IP addresses
 Built with fyne package
 
 ```
-fyne package
+fyne package --release
 ```
 
 ## Usage
@@ -20,4 +20,4 @@ The latest windows executable is attached to the [releases](https://github.com/r
 Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
 
 ## License
-[GNU GPL v3](https://choosealicense.com/licenses/gpl-3.0/)
+[GNU GPL v3](https://choosealicense.com/licenses/gpl-3.0/)