docs(README): Update logo image to assets and implement in README.md

[EvickaStudio]

This pull request includes a small change to the README.md file. The change updates the image source for the Moodle Mate logo.

• README.md: Changed the image source from assets/logo.svg to assets/moodlematev_gh_preview.png for the Moodle Mate logo.

Summary by Sourcery

Documentation:

• Update the Moodle Mate logo in the README to use a new PNG image.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request updates the Moodle Mate logo in the README.md file. The image source was changed from an SVG file to a PNG file located in the assets directory.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Updated the Moodle Mate logo image source in the README file.	Changed the image source for the Moodle Mate logo. Updated the logo file extension from SVG to PNG.	README.md

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[sourcery-ai]

Hey @EvickaStudio - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider using a vector image format like SVG for the logo to ensure it scales well on different displays.

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[sourcery-ai]

question (typo): Possible typo in image filename.

The filename "moodlematev_gh_preview.png" seems to have an extra 'v'. Was this intentional? Should it be "moodlemate_gh_preview.png"?

Suggested change

	<img src="assets/moodlematev_gh_preview.png" alt="Moodle Mate Logo">
	<img src="assets/moodlemate_gh_preview.png" alt="Moodle Mate Logo">