fix: correct GUI artifact path in release workflow

Author: m_igashi

.github/workflows/release.yml

@@ -92,14 +92,14 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: mp3rgui-${{ matrix.target }}
-          path: target/${{ matrix.target }}/release/mp3rgui
+          path: mp3rgui/target/${{ matrix.target }}/release/mp3rgui
 
       - name: Upload artifact (Windows)
         if: runner.os == 'Windows'
         uses: actions/upload-artifact@v4
         with:
           name: mp3rgui-${{ matrix.target }}
-          path: target/${{ matrix.target }}/release/mp3rgui.exe
+          path: mp3rgui/target/${{ matrix.target }}/release/mp3rgui.exe
 
   release:
     name: Create Release