Fix DO droplet link bug.

README.md

@@ -14,7 +14,7 @@
 [![](https://badgen.net/badge/srs/stackoverflow/orange?icon=terminal)](https://stackoverflow.com/questions/tagged/simple-realtime-server)
 [![](https://opencollective.com/srs-server/tiers/badge.svg)](https://opencollective.com/srs-server)
 [![](https://img.shields.io/docker/pulls/ossrs/srs)](https://hub.docker.com/r/ossrs/srs/tags)
-[![](https://ossrs.net/wiki/images/do-btn-srs-125x20.svg)](https://cloud.digitalocean.com/droplets/new?appId=133468816&size=s-2vcpu-2gb&region=sgp1&image=ossrs-srs&type=applications)
+[![](https://ossrs.net/wiki/images/do-btn-srs-125x20.svg)](https://marketplace.digitalocean.com/apps/srs)
 [![](https://api.securityscorecards.dev/projects/github.com/ossrs/srs/badge)](https://api.securityscorecards.dev/projects/github.com/ossrs/srs)
 [![](https://bestpractices.coreinfrastructure.org/projects/5619/badge)](https://bestpractices.coreinfrastructure.org/projects/5619)