Fix: Image links in readme files [alkemio#711]

[ccanos]

Describe the background of your pull request

Fix the readme's logo image at the top url to point to the new domain

Additional context

After the domain change readme files are broken

Governance

• [ ] Documentation is added
• [ ] Test cases are added or updated

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• I've read and understand the Code of Conduct https://github.com/alkem-io/.github/blob/master/CODE_OF_CONDUCT.md.
• I understand that any contributions or suggestions I made may make it into the actual code. I've read the License https://github.com/alkem-io/Coordination/blob/master/LICENSE.
• I understand that submitting the pull request requires agreeing to and signing the contributor license agreement.

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