fix nexus CA secret namespace

The namespcace in the nexus CA secret is wrong. Looks like a copy and paste error when this resource was originally created.

chart/templates/nexus-repository-manager/secret-ca.yaml

@@ -3,8 +3,8 @@ apiVersion: v1
 kind: Secret
 metadata:
   name: {{.Values.sso.secretName}}
-  namespace: anchore
+  namespace: nexus-repository-manager
 type: Opaque
 data:
   ca.pem: {{ .Values.sso.certificate_authority | b64enc }}
-{{- end }}
\ No newline at end of file
+{{- end }}