try？

Author: yuzelin

.github/workflows/create-source-release.yml

@@ -29,7 +29,8 @@ jobs:
       - name: Setup GPG
         run: |
           mkdir -p ~/.gnupg
-          echo "${{ secrets.GPG_PRIVATE_KEY }}" | gpg --batch --import --yes
+          chmod 700 ~/.gnupg
+          echo ${{ secrets.GPG_PRIVATE_KEY }} | gpg --batch --import --yes
           echo "use-agent" >> ~/.gnupg/gpg.conf
           echo "pinentry-program /usr/bin/pinentry" >> ~/.gnupg/gpg-agent.conf
           echo "allow-loopback-pinentry" >> ~/.gnupg/gpg-agent.conf