Files saved with capitalized extensions

[diced]

Describe the bug
Files are saved with capitalized filenames: screenshot-1748124585-main-1512x982.PNG, instead of something like screenshot-1748124585-main-1512x982.png. pretty small issue but it annoyed me 😂

To Reproduce
Steps to reproduce the behavior:

1. Post Media Tasks: Save to disk + Clipboard
2. Take any screenshot, region, entire screen, or window produce the same filename
3. Open a terminal or finder and head over to where the screenshot is stored
4. The screenshot that is saved will have an extension like PNG

Expected behavior
File should have a lowercase extension, png, jpg, etc.

Desktop (please complete the following information):

• OS: MacOS 15.5 (24F74)
• Version 4.2.3 from Homebrew

Additional context
I would've tried to make a pull request to fix this since it seemed like a simple fix but I was unable to build the project using Xcode and a personal account due to something requiring iCloud (?), anyway I think it's a simple fix:

In: https://github.com/itoolio/ishare/blob/dev/ishare/Capture/ImageCapture.swift#L44

    let uniqueFilename = "\(fileName)-\(timestamp)\(suffix).\(fileType)"

I believe should actually be:

    let uniqueFilename = "\(fileName)-\(timestamp)\(suffix).\(fileType.rawValue)"

I have no experience with swift but I assume that it's not reading the string value of the enum but rather using the name associated with it, PNG, JPG, etc.