Release 0.25.2

# History

## 0.25.2

Install/update via the bootstrap script:

```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.25.2/bootstrap.sh
sudo DOKKU_TAG=v0.25.2 bash bootstrap.sh
```

### Bug Fixes

- #4760: @josegonzalez Add missing rsync to OS dependency list for git:sync command

### New Features

- #4761: @josegonzalez Correct permissions for userns support
- #4742: @ashkulz bootstrap: add support for Debian 11 (bullseye)

### Documentation

- #4747: @erickedji Fix process management references to formation key in app.json

### Other

- #4753: @dependabot[bot] chore(deps): bump socket.io from 4.1.3 to 4.2.0 in /tests/apps/.websocket.disabled
- #4750: @dependabot[bot] chore(deps-dev): bump heroku/heroku-buildpack-php from 196 to 197 in /tests/apps/php
- #4758: @ltalirz Fix typo in network docs
- #4748: @trival Remove spare backtick in 0.25.0-migration-guide.md

docs/development/release-process.md

@@ -29,7 +29,7 @@ The workflow looks like this:
 ```shell
 # having dokku-arch in ../dokku-arch
 vagrant up build-arch
-# wait for "==> build-arch: ==> Finished making: dokku 0.25.1-2 (Mon Feb 22 23:20:37 CET 2016)"
+# wait for "==> build-arch: ==> Finished making: dokku 0.25.2-2 (Mon Feb 22 23:20:37 CET 2016)"
 cd ../dokku-arch
 git add PKGBUILD .SRCINFO
 git commit -m 'Update to dokku 0.9.9'