install setuptools before making sdist

Author: taku910

.github/workflows/wheel.yml

@@ -80,7 +80,9 @@ jobs:
 
       - name: Build sdist archive
         working-directory: python
-        run: sh build_sdist.sh
+        run: |
+          python -m pip setuptools
+          sh build_sdist.sh
 
       - name: Fetch sdist archive
         uses: tj-actions/glob@2deae40528141fc53131606d56b4e4ce2a486b29 # v22.0.2