GH Actions: Update to v4 upload artifact

Author: mjc4wilton

.github/workflows/arma.yml

@@ -46,7 +46,7 @@ jobs:
     - name: Rename build folder
       run: mv .hemttout/build .hemttout/@bocr
     - name: Upload Artifact
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: BOCR-${{ github.sha }}-nobin
         path: .hemttout/@*