update eth chain names

Author: Anmol1696

starship/docker/chains/versions.yaml

@@ -139,21 +139,21 @@ chains:
     tags:
       - v8.0.3
       - v7.0.0
-  - name: ethereum-client-go
+  - name: ethereum/client-go
     base: ethereum/client-go
     file: Dockerfile.base
     tags:
       - latest
       - stable
       - v1.14.12
       - v1.14.11
-  - name: ethereum-beacon-chain
+  - name: prysm/beacon-chain
     base: gcr.io/prysmaticlabs/prysm/beacon-chain
     file: Dockerfile.eth-beacon
     tags:
       - stable
       - v5.2.0
-  - name: ethereum-validator
+  - name: prysm/validator
     base: gcr.io/prysmaticlabs/prysm/validator
     file: Dockerfile.eth-validator
     tags: