Fix logging of grantlee5 plugins directory

Author: TheAssassin

grantlee5/linuxdeploy-plugin-grantlee5.sh

@@ -91,7 +91,7 @@ EOF
     popd &>/dev/null
 fi
 
-echo "GRANTLEE5_PLUGINS_DIR=$\GRANTLEE5_PLUGINS_DIR"
+echo "\$GRANTLEE5_PLUGINS_DIR=$GRANTLEE5_PLUGINS_DIR"
 
 if [[ ! -d "$GRANTLEE5_PLUGINS_DIR" ]]; then
     echo "Error: grantlee5 plugins directory does not exist or could not be found"