Fix redirect (#529)

Author: JuliaMongo

config/redirects

@@ -58,4 +58,4 @@ raw: kubernetes-operator/release-notes -> ${base}/stable/release-notes/
 
 # v1.8 and later
 [v1.8-*]: kubernetes-operator/${version}/tutorial/upgrade-k8s-operator-v161-and-earlier -> ${base}/${version}/tutorial/upgrade-k8s-operator/
-[v1.8-*]: kubernetes-operator/${version}/tutorial/upgrade-k8s-operator-v9-and-earlier -> -> ${base}/${version}/tutorial/upgrade-k8s-operator/
+[v1.8-*]: kubernetes-operator/${version}/tutorial/upgrade-k8s-operator-v9-and-earlier -> ${base}/${version}/tutorial/upgrade-k8s-operator/