Updates artifacthub annotations

Author: gcaracuel

helm/oauth2-proxy/Chart.yaml

@@ -35,7 +35,7 @@ kubeVersion: ">=1.9.0-0"
 annotations:
   artifacthub.io/changes: |
     - kind: changed
-      description: Updated the Redis chart to the latest version
+      description: Fix link in readme to existingSecret needed fields
       links:
         - name: Github PR
-          url: https://github.com/oauth2-proxy/manifests/pull/194
+          url: https://github.com/oauth2-proxy/manifests/pull/193