Update airnode-examples list with coingecko-http-gateways integration

[dcroote]

Closes #1212

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[wkande]

@dcroote - This URL in the PR does not exist: https://github.com/api3dao/airnode/tree/v0.10/packages/airnode-examples/integrations/coingecko-http-gateways Are we waiting on some other merge in the Airnode repo, say v0.11? Maybe because coingecko-signed-data will change?

This one is still there: https://github.com/api3dao/airnode/tree/v0.10/packages/airnode-examples/integrations/coingecko-signed-data

[dcroote]

This URL in the PR does not exist

Correct.

Are we waiting on some other merge in the Airnode repo, say v0.11? Maybe because coingecko-signed-data will change?

Yes exactly. In v0.11 coingecko-signed-data and coingecko-testable will be combined into coingecko-http-gateways. Then after the v0.11 release, that URL will have v0.10 replaced with v0.11 and begin working.