Update README with accepted paper information

Author: zitongzhan

README.md

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   <img src="https://raw.githubusercontent.com/sair-lab/bae/93eb45121965719c1abbed9437b4832f669b8c87/assets/github-banner.svg" alt="bundle adjustment in the eager-mode" width="100%" />
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+  <a>Accepted to <em>IEEE Transactions on Robotics (T-RO)</em>, 2026</a>
+</p>
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   <a href="https://github.com/zitongzhan">Zitong Zhan</a>, <a href="https://www.linkedin.com/in/huan-xu-999700169/?locale=en_US">Huan Xu</a>, Zihang Fang, <a href="https://www.linkedin.com/in/william-xp-wei/">Xinpeng Wei</a>, <a href="https://theairlab.org/team/yaoyuh/">Yaoyu Hu</a>, and <a href="https://sairlab.org">Chen Wang</a>
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   <a href="https://pypose.org/bae/">🌐 Project Page</a> | <a href="https://arxiv.org/abs/2409.12190">📄 PDF</a>