Add permissions for OIDC authentication in PyPI Publish workflow

This commit adds the necessary `id-token` permissions with a value of
`write` to the PyPI Publish workflow. This permission is required
for OpenID Connect (OIDC) authentication when publishing packages to
PyPI. The absence of this permission was causing the workflow to fail.

.github/workflows/pypi-publish.yml

@@ -16,6 +16,9 @@ jobs:
     needs: run-test
     runs-on: ubuntu-latest
     environment: release # Make sure this matches the environment name you set on PyPI
+
+    permissions:
+      id-token: write
 
     steps:
     - name: Check out repository