build(deps): 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/linux.yml

@@ -60,7 +60,7 @@ jobs:
         run:
           meson test -C build --print-errorlogs --setup=valgrind --no-suite python-tests
       - name: Upload test logs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: test logs
@@ -75,7 +75,7 @@ jobs:
                 exit 1
             fi
       - name: Store doxygen docs for use by the pages workflow
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: success()
         with:
           name: doxygen-docs