Update release_pypi.yml

Author: ilikecake

.github/workflows/release_pypi.yml

@@ -11,6 +11,9 @@ on:
 jobs:
   upload-release-assets:
     runs-on: ubuntu-latest
+    permissions:
+      # IMPORTANT: this permission is mandatory for trusted publishing
+      id-token: write
     steps:
     - name: Run PyPI Release CI workflow
       uses: adafruit/workflows-circuitpython-libs/release-pypi@main