actions: only upload wheels

`overwrite` configuration on `actions/upload-artifact` does not work
as intended as it does not really "overwrite" a file but it first
deletes it and then upload the new copy. Obviously, this does not work
on parallel builds.

If only devs would learn english...

.github/workflows/action.yml

@@ -50,7 +50,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: windows-build
-          path: dist/
+          path: dist/*.whl
           overwrite: true
 
   build-macos-intel:
@@ -104,7 +104,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: macos-intel-build
-          path: dist/
+          path: dist/*.whl
           overwrite: true
 
   build-macos-arm:
@@ -158,7 +158,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: macos-arm-build
-          path: dist/
+          path: dist/*.whl
           overwrite: true
 
   build-macos-universal:
@@ -198,5 +198,5 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: macos-universal-build
-          path: dist/
+          path: dist/*.whl
           overwrite: true