github-actions: bump actions/upload-artifact from 4 to 6

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...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/_deploy.yml

@@ -144,7 +144,7 @@ jobs:
           restore-from-cache: "true"
           cache-suffix: ${{ env.CACHE_NAME }}
       - name: Archive swagger
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: swagger
           path: |

.github/workflows/pull-requests.yml

@@ -314,7 +314,7 @@ jobs:
           requires-aws: true
           save-to-cache: "true"
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: "${{ needs.create-coverage-name.outputs.coverage-name }}-coverage"
           path: "sonarcloud-coverage.xml"