Add Amazon ECS Service Connect icon

[kakakakakku]

Hi 😀

The motivation for this pull request is to add the Amazon ECS Service Connect icon.

Check ✔️

I checked my sample code.

if __name__ == "__main__":
    from diagrams import Diagram
    from diagrams.aws.compute import ElasticContainerServiceServiceConnect

    with Diagram("", filename="../../../main", show=False):
        sc = ElasticContainerServiceServiceConnect("Amazon ECS Service Connect")
        sc

Could you please review? Thanks a lot 👍