Use pinned version of InstaScale image

Signed-off-by: Anish Asthana <anishasthana1@gmail.com>

Author: anishasthana

config/internal/instascale/deployment.yaml.tmpl

@@ -16,7 +16,7 @@ spec:
         app: instascale-{{.Name}}
     spec:
       containers:
-      - image: quay.io/project-codeflare/instascale-controller:latest
+      - image: quay.io/project-codeflare/instascale-controller:v0.0.3
         name: instascale
         resources: {{.ControllerResources}}
       serviceAccountName: instascale-{{.Name}}-sa