Update package.sh

Author: alberic89

.ci_scripts/package.sh

@@ -21,7 +21,7 @@ if [ "$SOURCE" = "ON" ]; then
     cpack --config CPackSourceConfig.cmake -G TGZ;
 fi
 
-if ([ "$OS_NAME" = "ubuntu-latest" ]) && [ "$PACKAGE" = "ON" ]; then
+if ([[ "$OS_NAME" == "ubuntu"* ]]) && [ "$PACKAGE" = "ON" ]; then
     ../.ci_scripts/build_appimage.sh
     # extract built appimages for uploading
     mv ~/out/* .