Release 0.20.3

# History

## 0.20.3

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.20.3/bootstrap.sh
sudo DOKKU_TAG=v0.20.3 bash bootstrap.sh
```

### New Features

- #3926: @josegonzalez Add proper support for various buildpack urls

### Other

- #3928: @dependabot-preview[bot] chore(deps): bump google.golang.org/grpc from 1.28.0 to 1.28.1 in /tests/apps/gogrpc
- #3925: @dependabot-preview[bot] chore(deps): bump flask from 1.1.1 to 1.1.2 in /tests/apps/python-flask
- #3924: @dependabot-preview[bot] chore(deps): bump flask from 1.1.1 to 1.1.2 in /tests/apps/multi

docs/getting-started/install/docker.md

@@ -3,7 +3,7 @@
 Pull the dokku/dokku image:
 
 ```shell
-docker pull dokku/dokku:0.20.2
+docker pull dokku/dokku:0.20.3
 ```
 
 Next, run the image.
@@ -17,7 +17,7 @@ docker run \
   --publish 8443:443 \
   --volume /var/lib/dokku:/mnt/dokku \
   --volume /var/run/docker.sock:/var/run/docker.sock \
-  dokku/dokku:0.20.2
+  dokku/dokku:0.20.3
 ```
 
 Dokku is run with the following options: