Update ghcr.io/tecnativa/docker-socket-proxy Docker tag to v0.3.0 (#40)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/tecnativa/docker-socket-proxy](https://redirect.github.com/Tecnativa/docker-socket-proxy)
| minor | `0.2.0` -> `0.3.0` |

---

### Release Notes

<details>
<summary>Tecnativa/docker-socket-proxy
(ghcr.io/tecnativa/docker-socket-proxy)</summary>

###
[`v0.3.0`](https://redirect.github.com/Tecnativa/docker-socket-proxy/releases/tag/v0.3.0)

[Compare
Source](https://redirect.github.com/Tecnativa/docker-socket-proxy/compare/v0.2.0...v0.3.0)

#### What's Changed

- test: pause after container creation + poetry deps update by
[@&#8203;proudier](https://redirect.github.com/proudier) in
[Tecnativa/docker-socket-proxy#138
- Revert "chore: updated to HAproxy 3.0 and forced running as root" by
[@&#8203;proudier](https://redirect.github.com/proudier) in
[Tecnativa/docker-socket-proxy#136

**Full Changelog**:
Tecnativa/docker-socket-proxy@v0.2.0...v0.3.0

</details>

---

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---

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---

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docker/compose/dockerproxy/docker-compose.yml

@@ -1,6 +1,6 @@
 services:
  dockerproxy:
- image: ghcr.io/tecnativa/docker-socket-proxy:0.2.0
+ image: ghcr.io/tecnativa/docker-socket-proxy:0.3.0
  container_name: dockerproxy
  labels:
  - homepage.group=Docker