Added Fuga Cloud to adopter page

[Sinscerly]

What this PR does / why we need it:
This PR adds Fuga Cloud to the adopters page.

Which issue(s) this PR fixes:
N/A

Special notes for your reviewer:
N/A

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

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[gardener-robot]

@Sinscerly Thank you for your contribution.

[gardener-robot-ci-1]

Thank you @Sinscerly for your contribution. Before I can start building your PR, a member of the organization must set the required label(s) {'reviewed/ok-to-test'}. Once started, you can check the build status in the PR checks section below.

[n-boshnakov]

Hello @Sinscerly and thank you for your contribution! Since Gardener is an open source project, would you kindly sign the Contributors agreement? This is a standard step in contributing to open source projects and it needs to be done before we can review your PR.

[Sinscerly]

It seems I had some settings wrong. My public git account had signed the CLA. Although the commit is not connected to my account. I'll recreate it and will close this one.