Rename screenshot

[KristjanESPERANTO]

(Issue taken from BrianHepler/MMM-BirdNET#5)

To get a the proper image as screenshot for the new module list I suggest renaming the screenshot image.

The script for choosing an image works like this: It searches the module's repo for an image that contains "screenshot" or "example". If it doesn't find anything like that (which is the case for this module), it takes the first image it finds in the repo.

So my suggestion is to change the name of the screenshot from module1.jpg to module_screenshot1.jpg.

[BrianHepler]

Okay, thanks for explaining the logic at work there. I have some other updates to that module that need to be implemented. I'll rename the screenshot at that time.