Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

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

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

.github/workflows/integration_test.yml

@@ -68,13 +68,13 @@ jobs:
           examples_branch: ${{ github.event.inputs.pyglotaran_examples_branch }}
 
       - name: Upload Example Plots Artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: example-results
           path: ${{ steps.example-run.outputs.plots-path }}
 
       - name: Upload Example Results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: example-results
           path: ~/pyglotaran_examples_results

.github/workflows/update_compare_results.yml

@@ -78,7 +78,7 @@ jobs:
         shell: bash
 
       - name: Upload Example Results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: example-results
           path: ~/pyglotaran_examples_results