Also upload .tar.gz files

Closes #1135

Author: mxcl

.github/workflows/cd.yml

@@ -40,10 +40,12 @@ jobs:
       - name: include GPG pubkey
         run: echo "${{ secrets.GPG_PUBLIC_KEY }}" | base64 -d > $FILENAME/pkgx.dev.pub.asc
       - run: tar cJf $FILENAME.tar.xz $FILENAME
+      - run: tar czf $FILENAME.tar.zz $FILENAME
       - name: attach srcs to release
         run: gh release upload --clobber
           v${{ github.event.inputs.version }}
           ../$FILENAME.tar.xz
+          ../$FILENAME.tar.gz
         working-directory:
           ${{ env.FILENAME }}
         env: