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](https://github.com/actions/upload-artifact/compare/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/build-firmware.yaml

@@ -43,7 +43,7 @@ jobs:
           cp ./firmware/ext/openblt/Host/libopenblt.so deliver/
           cp ./misc/libopenblt_jni/build/libopenblt_jni.so deliver/
 
-#      - uses: actions/upload-artifact@v3
+#      - uses: actions/upload-artifact@v4
 #        if: 0
 #        name: libopenblt-linux
 #        path: |
@@ -100,7 +100,7 @@ jobs:
         cp ./firmware/ext/openblt/Host/libopenblt.dylib deliver/
         cp ./misc/libopenblt_jni/build/libopenblt_jni.dylib deliver/
 
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: bootcommander-linux
         path: |