Adjust start use in test_win_pkg_release job.

.gitlab-ci.yml

@@ -570,13 +570,13 @@ test_win_pkg_release:
       artifacts: true
   script:
     - dir
-    - start build\faust-$CI_COMMIT_TAG-amd64.exe /S
+    - start "" 'build\faust-%CI_COMMIT_TAG%-amd64.exe' /S
     - timeout 20
     - dir 'C:\Program Files\Faust\'
     - python -c "import pyfaust; print(pyfaust.version()); print(pyfaust.rand(5,5).toarray());"
     - python -c "import pyfaust.tests; pyfaust.tests.run_tests('cpu', 'real')"
     - cd "C:\Program Files\Faust"
-    - start uninstall.exe /S
+    - start "" 'uninstall.exe' /S
   only:
     - tags
   tags:
@@ -659,7 +659,7 @@ test_win_purepy_pkg_extra_pyver:
     - job: pkg_win_purepy_release_extra_pyver
       artifacts: true
 
-pypi_pub:
+.pypi_pub:
   stage: pkg_pub
   script:
     - python3 -m pip install --user twine