chore(deps): update dockurr/windows docker tag to v3.15 (#868)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [dockurr/windows](https://github.com/dockur/windows) | minor
| `3.14` -> `3.15` |

---

### Release Notes

<details>
<summary>dockur/windows (dockurr/windows)</summary>

###
[`v3.15`](https://github.com/dockur/windows/releases/tag/v3.15)

[Compare
Source](https://github.com/dockur/windows/compare/v3.14...v3.15)

#### What's Changed

- fix: Update download mirrors by
[@&#8203;kroese](https://github.com/kroese) in
[dockur/windows#729

**Full Changelog**:
dockur/windows@v3.14...v3.15

</details>

---

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rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
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---

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---

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Docker/Both/windows/docker-compose.yml

@@ -3,7 +3,7 @@
 version: '3.9'
 services:
   windows:
-    image: dockurr/windows:3.14
+    image: dockurr/windows:3.15
     container_name: windows
     devices:
       - /dev/kvm