fix(docs): correct SpaceRegistryAbi import path in README

[0xNeoDev]

Summary

• Corrects the SpaceRegistryAbi import path in README examples to use @graphprotocol/grc-20/abis instead of @graphprotocol/grc-20
• Updates all three code examples (submit edit, create personal space, full flow) to use the correct import

Context

SpaceRegistryAbi is exported from the /abis subpath, not from the package root. The README examples had the wrong import path, which would cause errors for users following the docs.

Optionally the Abi could be exported from the root export instead. In that case the README would be correct.

[changeset-bot]

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Latest commit: 955c3e7

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