Bump actions/upload-artifact from 2 to 3

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2 to 3.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v2...v3)

---
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/build.yaml

@@ -129,7 +129,7 @@ jobs:
         PLATFORMIO_BUILD_FLAGS: ${{ matrix.gui.build_flags }}
 
     - name: Upload output to GitHub
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v3
       with:
         name: ${{ matrix.env }}_${{ matrix.gui.name }}.bin
         path: .pio/build/${{ matrix.env }}/firmware.bin