fix: image name for custom naming scheme

Author: dheeraj-coding

.github/workflows/toolkit-base.yaml

@@ -5,7 +5,9 @@ on:
 
 env:
   REGISTRY: ghcr.io
-  IMAGE_NAME: "eks-toolkit-base"
+  IMAGE_SUFFIX: eks-toolkit-base
+  IMAGE_OWNER: ${{ github.repository_owner }}
+  IMAGE_NAME: ${{ env.IMAGE_OWNER }}/${{ env.IMAGE_SUFFIX }}
   BUILD_CONTEXT: tests/images/toolkit-base/
 
 jobs: