Supported envoyproxy versions for a gateway

[farodin91]

We use image pinning in our Kubernetes setup. I am finding it difficult to determine which version of envoyproxy I need to use.

Idea: Add a compatible table to the readme or release notes.

[zirain]

https://gateway.envoyproxy.io/news/releases/matrix/

[farodin91]

Thanks. It could be helpful to add to release notes.

[zirain]

What can I say, man. it's there: https://gateway.envoyproxy.io/news/releases/v1.4/

[farodin91]

I looked here https://github.com/envoyproxy/gateway/releases/tag/v1.4.1