[RENOVATE] Update actions/build-push-action action to v6 (#7)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/build-push-action](https://git.kjan.de/actions/build-push-action) | action | major | `v5` -> `v6` |

---

### Release Notes

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

### [`v6`](https://git.kjan.de/actions/build-push-action/compare/v5...v6)

[Compare Source](https://git.kjan.de/actions/build-push-action/compare/v5...v6)

</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 is behind base branch, 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

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4zNS4wIiwidXBkYXRlZEluVmVyIjoiMzguMzUuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

Reviewed-on: #7
Co-authored-by: Renovate <renovate@kjan.de>
Co-committed-by: Renovate <renovate@kjan.de>

.gitea/workflows/node-npm.yaml

@@ -36,7 +36,7 @@ jobs:
         password: ${{ secrets.DOCKER_PASSWORD }}
 
     - name: Build and push
-      uses: https://git.kjan.de/actions/build-push-action@v5
+      uses: https://git.kjan.de/actions/build-push-action@v6
       with:
         context: ./images/actions/node-npm
         push: ${{ github.ref == 'refs/heads/main' }}

.gitea/workflows/node-ssh.yaml

@@ -36,7 +36,7 @@ jobs:
         password: ${{ secrets.DOCKER_PASSWORD }}
 
     - name: Build and push
-      uses: https://git.kjan.de/actions/build-push-action@v5
+      uses: https://git.kjan.de/actions/build-push-action@v6
       with:
         context: ./images/actions/node-ssh
         push: ${{ github.ref == 'refs/heads/main' }}

.gitea/workflows/php-8.2.yaml

@@ -36,7 +36,7 @@ jobs:
         password: ${{ secrets.DOCKER_PASSWORD }}
 
     - name: Build and push
-      uses: https://git.kjan.de/actions/build-push-action@v5
+      uses: https://git.kjan.de/actions/build-push-action@v6
       with:
         context: ./images/actions/php-8.2
         push: ${{ github.ref == 'refs/heads/main' }}

.gitea/workflows/php-deployer.yaml

@@ -36,7 +36,7 @@ jobs:
         password: ${{ secrets.DOCKER_PASSWORD }}
 
     - name: Build and push
-      uses: https://git.kjan.de/actions/build-push-action@v5
+      uses: https://git.kjan.de/actions/build-push-action@v6
       with:
         context: ./images/actions/php-deployer
         push: ${{ github.ref == 'refs/heads/main' }}

.gitea/workflows/rust-node.yaml

@@ -36,7 +36,7 @@ jobs:
         password: ${{ secrets.DOCKER_PASSWORD }}
 
     - name: Build and push
-      uses: https://git.kjan.de/actions/build-push-action@v5
+      uses: https://git.kjan.de/actions/build-push-action@v6
       with:
         context: ./images/actions/rust-node
         push: ${{ github.ref == 'refs/heads/main' }}