[skip ci] Add comment for e2e.sh (#11617)

Signed-off-by: Jenny Li <jing.li@zilliz.com>

tests/scripts/e2e.sh

@@ -11,6 +11,8 @@
 # is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 # or implied. See the License for the specific language governing permissions and limitations under the License.
 
+
+# Exit immediately for non zero status
 set -e
 set -x