AWS Docker Install: broken link

[Simon Letort]

legend/docs/getting-started/installation-guide.md

Line 99 in 669cb8a

 This option is for software developers who want to run the Legend Docker images on AWS for running a proof of concept. Instructions can be found [here](aws-docker.md). 

[here](aws-docker.md) is a broken link,
suggestion to replace by [here](https://github.com/finos/legend/tree/master/installers/aws-docker)

[Ephrim Stanley]

Thanks for pointing this out. We are refactoring the installers. The "AWS installer" will be deleted soon. You can follow the PR here #533

[Simon Letort]

👍