Add ethereum-ecosystem.com to tools on layer 2 page [Fixes #11700]

[Maxservais]

Description

Adding https://www.ethereum-ecosystem.com/ to list of tools to be effective on layer 2s as per @konopkja's comment.

Related Issue

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[konopkja]

lgtm

[github-actions[bot]]

This issue is stale because it has been open 30 days with no activity.