Bump actions/upload-artifact from 4 to 6 (#968)

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] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/compile-arduino_wifinina-examples.yaml

@@ -62,7 +62,7 @@ jobs:
           sketches-report-path: ${{ env.SKETCHES_REPORTS_PATH }}
 
       - name: Save sketches report as workflow artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           if-no-files-found: error
           path: ${{ env.SKETCHES_REPORTS_PATH }}

.github/workflows/compile-seeed-studio-examples.yaml

@@ -74,7 +74,7 @@ jobs:
           sketches-report-path: ${{ env.SKETCHES_REPORTS_PATH }}
 
       - name: Save sketches report as workflow artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           if-no-files-found: error
           path: ${{ env.SKETCHES_REPORTS_PATH }}

.github/workflows/compile-unor4wifi-examples.yaml

@@ -53,7 +53,7 @@ jobs:
           sketches-report-path: ${{ env.SKETCHES_REPORTS_PATH }}
 
       - name: Save sketches report as workflow artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           if-no-files-found: error
           path: ${{ env.SKETCHES_REPORTS_PATH }}