Add a new paper using WarpX in the highlights (#6387)

Author: RemiLehe

Docs/source/highlights.rst

@@ -100,6 +100,11 @@ Laser-Plasma Interaction
 
 Scientific works in laser-ion acceleration and laser-matter interaction.
 
+#. Lei B, Zhang H, Seipt D, Bonatto A, Qiao B, Resta-López J, Xia G, and Welsch C.
+   **Coherent Synchrotron Radiation by Excitation of Surface Plasmon Polariton on Near-Critical Solid Microtube Surface**.
+   Phys. Rev. Lett. **135**, 205001, 2025.
+   `DOI:10.1103/cnym-16hc <https://doi.org/10.1103/cnym-16hc>`__
+
 #. Garten M, Bulanov S S, Hakimi S, Obst-Huebl L, Mitchell C E, Schroeder C B, Esarey E, Geddes C G R, Vay J-L, Huebl A.
    **Laser-plasma ion beam booster based on hollow-channel magnetic vortex acceleration**.
    Physical Review Research **6**, 033148, 2024.