Fix doc failure (#3039)

Summary:
Pull Request resolved: #3039

See title.

Reviewed By: Balandat

Differential Revision: D83800834

fbshipit-source-id: 6da8bcafb4acecc3c613b0c57a1d8a93952ca140

Author: David Eriksson

botorch/models/latent_kronecker_gp.py

@@ -6,6 +6,7 @@
 
 r"""
 References
+
 .. [lin2025scalable]
     J. A. Lin, S. Ament, M. Balandat, D. Eriksson, J. M. Hernández-Lobato, E. Bakshy.
     Scalable Gaussian Processes with Latent Kronecker Structure.