Fix create-namespace to only apply to install (#61)

The create-namespace option was being used with
uninstall and was not a valid option for 'helm uninstall'

action.yaml

@@ -38,7 +38,7 @@ inputs:
         description: 'Name of the helm deploy.'
         required: true
     action:
-        description: 'Specify whether you want to install or uninstall the target helm chart'
+        description: 'Specify whether you want to list, install or uninstall the target helm chart'
         required: false
         default: 'install'
     dry-run:

deploy.sh

@@ -195,8 +195,8 @@ if [ -n "$DEPLOY_NAMESPACE" ]; then
 fi
 
 # Create namespace if it doesn't exist. Requires cluster API permissions.
-# Will conflict with `list`, so don't set if in list mode
-if [ "${CREATE_NAMESPACE}" == "true" ] && [ "${HELM_ACTION}" != "list" ]; then
+# Only applies to `install` option. `helm upgrade` is not used.
+if [ "${CREATE_NAMESPACE}" == "true" ] && [ "${HELM_ACTION}" == "install" ]; then
     HELM_COMMAND="${HELM_COMMAND} --create-namespace"
 fi