Add SSVQE to list.

[github-actions]

Add SSVQE to list.

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Closes #193

[github-actions]

Standard tests

❌ The submission didn't pass the standard check.
Please follow minimal requirements for project or/and add ecosystem.json configuration in the root of the project.
Read more here https://github.com/mickahell/ecosystem/blob/main/docs/project_overview.md#adding-project-to-the-ecosystem.

Stable tests

⚠️ The submission didn't pass the stable check.
This means your project doesn't work with the latest version of Qiskit.
This is purely informational and doesn't affect your project joining the Ecosystem, but you may want to investigate the problem.

Development tests

⚠️ The submission didn't pass the development check.
This means your project might not work with the next version of Qiskit.
This is purely informational and doesn't affect your project joining Ecosystem.

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Logs: https://github.com/mickahell/ecosystem/actions/runs/6040694907
PR #194