chore(package): update docker/build-push-action action to v7 (#651)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[docker/build-push-action](https://redirect.github.com/docker/build-push-action)
| action | major | `v6.19.2` → `v7.0.0` |

---

### Release Notes

<details>
<summary>docker/build-push-action (docker/build-push-action)</summary>

###
[`v7.0.0`](https://redirect.github.com/docker/build-push-action/compare/v6.19.2...v7.0.0)

[Compare
Source](https://redirect.github.com/docker/build-push-action/compare/v6.19.2...v7.0.0)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

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

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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.github/workflows/image-kairos-ubuntu.yml

@@ -45,7 +45,7 @@ jobs:
         with:
           images: ghcr.io/${{ github.repository_owner }}/kairos-ubuntu
       - name: Build Image
-        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
+        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294 # v7.0.0
         with:
           build-args: |
             VERSION=${{ steps.version_tag.outputs.tag }}

.github/workflows/image-vscode-ssh-server.yml

@@ -44,7 +44,7 @@ jobs:
         with:
           images: ghcr.io/${{ github.repository_owner }}/vscode-ssh-server
       - name: Build Image
-        uses: docker/build-push-action@10e90e3645eae34f1e60eeb005ba3a3d33f178e8 # v6.19.2
+        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294 # v7.0.0
         with:
           build-args: |
             VERSION=${{ steps.version_tag.outputs.tag }}