fix: ci key export for gpg signing

Signed-off-by: Sam Gammon <sam@elide.ventures>

Author: sgammon

.github/workflows/job.native-image.yml

@@ -324,7 +324,8 @@ jobs:
         run: |
           cat <(echo -e "${{ secrets.SIGNING_KEY }}") | base64 -d | gpg --batch --import
           gpg --list-secret-keys --keyid-format LONG
-          gpg --export-secret-keys > /home/$(whoami)/.gnupg/secring.gpg
+          mkdir -p /home/$(whoami)/.gnupg/
+          gpg --export-secret-keys > /home/$(whoami)/.gnupg/secring.gpg || echo "No key exported."
       - name: "Artifact: Build Outputs"
         uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
         id: build-artifact