Change tpr into cr in configuration-flow.md (#1745)
Change tpr into cr in configuration-flow.md (#1745)

Signed-off-by: Guihua Zhu <93644e2360d2794411aef232e258bee6d6450e73@cmss.chinamobile.com>
istio/istio,geeknoid/istio,geeknoid/istio,frankbu/istio,frankbu/istio,smawson/istio,smawson/istio,smawson/istio,istio/istio,smawson/istio,smawson/istio,geeknoid/istio,geeknoid/istio,smawson/istio,geeknoid/istio,frankbu/istio,istio/istio,geeknoid/istio,frankbu/istio,frankbu/istio,frankbu/istio,istio/istio,istio/istio