add write permission for release step (#52)

.github/workflows/testing-and-deployment.yml

@@ -68,6 +68,7 @@ jobs:
       url: https://pypi.org/p/mapdl-archive
     permissions:
       id-token: write  # this permission is mandatory for trusted publishing
+      contents: write
     steps:
     - uses: actions/download-artifact@v4
     - name: Flatten directory structure