Don't try push from forks

Signed-off-by: Nic Cope <[email protected]>

Author: negz

.github/workflows/ci.yml

@@ -176,4 +176,5 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Push Multi-Platform Package to GHCR
+        if: env.XPKG_ACCESS_ID != ''
         run: "./crossplane --verbose xpkg push --package-files $(echo *.xpkg|tr ' ' ,) ${{ env.CROSSPLANE_REGORG }}:${{ env.XPKG_VERSION }}"