:memo: fix link url for SnowFS for Unity

[shiena]

Pull Request Template

Description

Fix link url for SnowFS for Unity

Checks

• [x] I added my name to the contributor list in CONTRIBUTORS.md
• [x] I understand that my work will be licensed under the given license of SnowFS
• [x] I am the original author, or I have authorization to submit this work.

Type of change

Please delete options that are not relevant.

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update

[daniellanner]

Thanks for updating this, @shiena 💪

[daniellanner]

@shiena seems we're having some pipeline issues. @seb-mtl and I will be looking into those and then happily accept and merge your changes 😄 thanks again!