Bump actions/upload-artifact from 4 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/zephyr.yml

@@ -44,21 +44,21 @@ jobs:
           docker run --rm -w /workspace -v "$(pwd):/workspace/bacnet" "$ZEPHYR_CONTAINER" /bin/bash -c "$DOCKER_RUN_TARGET"
       - name: Upload sample Twister results
         if: ${{ always() }}
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: twister-out.samples
           path: twister-out.samples
           if-no-files-found: warn
       - name: Upload unit_testing Twister results
         if: ${{ always() }}
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: twister-out.unit_testing
           path: twister-out.unit_testing
           if-no-files-found: warn
       - name: Upload subsys Twister results
         if: ${{ always() }}
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: twister-out.subsys
           path: twister-out.subsys