Update README.md

Author: ZuoJiaxing

README.md

@@ -87,8 +87,8 @@ following:
   organization={IEEE}
 }
 @Journal{lv2022,
-  title      = {{OA-LICalib}: Observability-Aware Intrinsic and Extrinsic Calibration of LiDAR-IMU Systems},
-  author     = {Jiajun Lv, Xingxing Zuo, Kewei Hu,  Jinhong Xu, Guoquan Huang, and Yong Liu},
+  title={{OA-LICalib}: Observability-Aware Intrinsic and Extrinsic Calibration of LiDAR-IMU Systems},
+  author={Jiajun Lv, Xingxing Zuo, Kewei Hu,  Jinhong Xu, Guoquan Huang, and Yong Liu},
   journal={IEEE Transactions on Robotics},
   year={2022},
   publisher={IEEE}