Fixed backslash error in citations.

Author: hannorein

rebound/citations.py

@@ -168,7 +168,7 @@ def cite(sim):
         bib += """@ARTICLE{reboundtrace,
         author = {{Lu}, Tiger and {Hernandez}, David M. and {Rein}, Hanno},
         title = "{TRACE: a code for time-reversible astrophysical close encounters}",
-      journal = {\mnras},
+      journal = {\\mnras},
      keywords = {Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Computational Physics},
          year = 2024,
         month = sep,