update readme typo

README.md

@@ -142,7 +142,7 @@ rosbag play your-bag.bag -r 3
     <img src="./config/doc/gps-demo.gif" alt="drawing" width="400"/>
 </p>
 
-  - **KITTI:** Since LIO-SAM needs a high-frequency IMU for function properly, we need to use KITTI raw data for testing. One problem remains unsolved is that the intrinsics of the IMU is unknown, which has a big impact on the accuracy of LIO-SAM. Download the provided sample data and make the following changes in "params.yaml":
+  - **KITTI:** Since LIO-SAM needs a high-frequency IMU for function properly, we need to use KITTI raw data for testing. One problem remains unsolved is that the intrinsics of the IMU are unknown, which has a big impact on the accuracy of LIO-SAM. Download the provided sample data and make the following changes in "params.yaml":
     - extrinsicTrans: [-8.086759e-01, 3.195559e-01, -7.997231e-01] 
     - extrinsicRot: [9.999976e-01, 7.553071e-04, -2.035826e-03, -7.854027e-04, 9.998898e-01, -1.482298e-02, 2.024406e-03, 1.482454e-02, 9.998881e-01]
     - extrinsicRPY: [9.999976e-01, 7.553071e-04, -2.035826e-03, -7.854027e-04, 9.998898e-01, -1.482298e-02, 2.024406e-03, 1.482454e-02, 9.998881e-01]

config/params.yaml

@@ -70,7 +70,7 @@ lio_sam:
   surroundingKeyframeSearchRadius: 50.0         # meters, within n meters scan-to-map optimization (when loop closure disabled)
 
   # Loop closure
-  loopClosureEnableFlag: true
+  loopClosureEnableFlag: false
   surroundingKeyframeSize: 25                   # submap size (when loop closure enabled)
   historyKeyframeSearchRadius: 15.0             # meters, key frame that is within n meters from current pose will be considerd for loop closure
   historyKeyframeSearchTimeDiff: 30.0           # seconds, key frame that is n seconds older will be considered for loop closure