Update README.md

Signed-off-by: Alex Jones <[email protected]>

Author: AlexsJones

README.md

@@ -12,6 +12,7 @@ The open-feature-operator is a Kubernetes native operator that allows you to exp
 _Requires [cert manager](https://cert-manager.io/docs/installation/kubernetes/) installed_
 
 ```
+kubectl create namespace open-feature-operator-system
 kubectl apply -f https://github.com/open-feature/open-feature-operator/releases/download/v0.0.7/certificate.yaml
 kubectl apply -f https://github.com/open-feature/open-feature-operator/releases/download/v0.0.7/release.yaml
 ```