fix url in readme

2 jobs for master in 3 minutes and 3 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #1656
docker
build

00:03:03

 
  Deploy
skipped #1657
docker
deploy_latest
 
Name Stage Failure
failed
build Build
34e5da9430aa: Waiting
ef32bf2cb8c7: Waiting
71443e11897d: Waiting
b0d956d30a3c: Pulling fs layer
b0d956d30a3c: Waiting
34e5da9430aa: Waiting
b0d956d30a3c: Waiting
error pulling image configuration: Get https://production.cloudflare.docker.com/registry-v2/docker/registry/v2/blobs/sha256/f7/f7e4e79f0f78b7cae92dacbd840b1887fb490ad30b5b3735bd8bc69f09b13d75/data?verify=1596869060-73CIulb2e31MNqX%2F8SrAY6pEMGc%3D: dial tcp 104.18.123.25:443: i/o timeout
ERROR: Job failed: exit status 1