Fix bad log message in GRB notify script

cspp_geo_grb_notify/grb-notify.sh

@@ -28,7 +28,7 @@ if [[ ${S3_ENDPOINT} != "" ]]; then
 fi
 
 while [[ ! -d "${WATCH_DIR}" ]]; do
-    echo "$(date +%Y-%m-%d %H:%M:%S): Watch directory doesn't exist. Waiting..."
+    echo "$(date +"%Y-%m-%d %H:%M:%S"): Watch directory doesn't exist. Waiting..."
     sleep 60
 done