Bump actions/upload-artifact from 5 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/build-and-push-image.yml

@@ -78,7 +78,7 @@ jobs:
       - name: Save Docker image
         run: docker save -o image.tar mavis-reporting:latest
       - name: Upload Docker image
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: image
           path: image.tar

.github/workflows/ci.yml

@@ -55,15 +55,15 @@ jobs:
           SECRET_KEY: "${{ secrets.SECRET_KEY_FOR_TESTS }}"
           COVERAGE_THRESHOLD: 80
         run: mise test:coverage
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         id: upload-html-report-artifact-step
         if: always()
         with:
           name: coverage-html
           path: htmlcov
           retention-days: 10
           compression-level: 0
-      - uses: actions/upload-artifact@v5
+      - uses: actions/upload-artifact@v6
         id: upload-coverage-badge-artifact-step
         if: always()
         with:

.github/workflows/deploy-application.yml

@@ -115,7 +115,7 @@ jobs:
       - name: Rename task definition file
         run: mv ${{ steps.create-task-definition.outputs.task-definition }} ${{ runner.temp }}/reporting-task-definition.json
       - name: Upload artifact for reporting task definition
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: ${{ inputs.environment }}-reporting-task-definition
           path: ${{ runner.temp }}/reporting-task-definition.json