[kots]: add docker.io to registry allowlist

Author: Simon Emms

install/kots/manifests/gitpod-installer-job.yaml

@@ -157,6 +157,7 @@ spec:
 
               # Add the registries to the server allowlist
               yq e -i ".containerRegistry.privateBaseImageAllowList += $(cat /tmp/kotsregistry.json | jq '.auths' | jq -rc 'keys')" "${CONFIG_FILE}"
+              yq e -i ".containerRegistry.privateBaseImageAllowList += \"docker.io\"" "${CONFIG_FILE}"
 
               if [ '{{repl ConfigOptionEquals "reg_incluster" "0" }}' = "true" ];
               then