chore: ensure testpublish is boolean

Author: davidlday

.github/workflows/pypi-publish.yml

@@ -24,7 +24,7 @@ jobs:
     uses: prosegrinder/.github/.github/workflows/python-poetry-publish.yaml@main
     with:
       newversion: ${{ github.event.inputs.newversion }}
-      testpublish: ${{ github.event.inputs.testpublish }}
+      testpublish: ${{ 'true' == github.event.inputs.testpublish }}
     secrets:
       TEST_PYPI_API_TOKEN: ${{ secrets.TEST_PYPI_API_TOKEN }}
       PYPI_API_TOKEN: ${{ secrets.PYPI_API_TOKEN }}