Cargo Generate-rpm without copy

Set the source directory for generate-rpm by supplying --target-dir.

```
When --target-dir TARGET-DIR and --target x86_64-unknown-linux-gnu are specified, a binary RPM file will be created at TARGET-DIR/x86_64-unknown-linux-gnu/generate-rpm/XXX.rpm instead of target/generate-rpm/XXX.rpm. In this case, the source of the asset { source = "target/release/XXX", dest = "/usr/bin/XXX" } will be treated as TARGET-DIR/x86_64-unknown-linux-gnu/release/XXX instead of target/release/XXX.
```

.github/workflows/build-ci.yml

@@ -79,11 +79,10 @@ jobs:
         cargo deb --target ${{ matrix.target }}
     - name: Package RPM
       run: |
-        cp -r ./target/${{ matrix.target }}/release ./target
-        cargo generate-rpm --target ${{ matrix.target }}
+        cargo generate-rpm --target-dir ./target --target ${{ matrix.target }}
     - uses: actions/upload-artifact@v3
       with:
         name: deb-rpm-${{ matrix.target }}
         path: |
           target/${{ matrix.target }}/debian/*.deb
-          target/${{ matrix.target }}/generate-rpm/*.rpm
+          target/${{ matrix.target }}/generate-rpm/*.rpm