[GHA] use different secret for testpypi, pkg only from 3.8

Author: maltanar

.github/workflows/pypi-publish.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9"]
+        python-version: ["3.8"]
 
     steps:
     - uses: actions/checkout@v2

.github/workflows/testpypi-publish.yml

@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.9"]
+        python-version: ["3.8"]
 
     steps:
     - uses: actions/checkout@v2
@@ -27,7 +27,7 @@ jobs:
     - name: Build and publish
       env:
         TWINE_USERNAME: __token__
-        TWINE_PASSWORD: ${{ secrets.PYPI_API_TOKEN }}
+        TWINE_PASSWORD: ${{ secrets.TESTPYPI_API_TOKEN }}
       run: |
         python setup.py sdist bdist_wheel
         twine upload --repository testpypi dist/*