CI: let the Linux build handle artifact deployment

Author: ctrueden

.github/setup.sh

@@ -1,3 +1,10 @@
 #!/bin/sh
 curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/master/ci-setup-github-actions.sh
 sh ci-setup-github-actions.sh
+
+# Let the Linux build handle artifact deployment.
+if [ "$(uname)" != Linux ]
+then
+  echo "No deploy -- non-Linux build"
+  echo "NO_DEPLOY=1" >> $GITHUB_ENV
+fi