git: Don't upload flatpak build twice

.github/workflows/build.yml

@@ -1171,6 +1171,8 @@ jobs:
           manifest-path: dist/flatpak/net.werwolv.ImHex.yaml
           cache-key: flatpak-builder-${{ matrix.architecture }}-${{ github.sha }}
           arch: ${{ matrix.flatpak_arch }}
+          upload-artifact: false
+
 
       - name: 🗝️ Generate build provenance attestations
         uses: actions/attest-build-provenance@v2
@@ -1183,7 +1185,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           if-no-files-found: error
-          name: ${{ matrix.name }} ${{ matrix.release_num }} Flatpak ${{ matrix.architecture }}
+          name: Flatpak ${{ matrix.architecture }}
           path: |
             imhex-${{ env.IMHEX_VERSION }}-${{ matrix.architecture }}.flatpak