Add Mastodon to Website Social Handles

[avoidthehack]

What would you like to add or change?:
Add your Mastodon account to the socials for the Safing website! :)

[github-actions]

Greetings and welcome to our community! As this is the first issue you opened here, we wanted to share some useful infos with you:

• 🗣️ Our community on Discord is super helpful and active. We also have an AI-enabled support bot that knows Portmaster well and can give you immediate help.
• 📖 The Wiki answers all common questions and has many important details. If you can't find an answer there, let us know, so we can add anything that's missing.

[dhaavi]

Yup. Good point.
I it didn't happen yet because we were in a hurry and were missing the icon for mastodon.

I will look into it.