updated 5 readme file for pylammps/optog

Classical-MD-Modules/modules/pylammps/optog/readme.rst

@@ -120,7 +120,7 @@ If needed you can include latex mathematics like
 :math:`\frac{ \sum_{t=0}^{N}f(t,k) }{N}`
 which won't show up on GitLab/GitHub but will in final online documentation.
 
-If you want to add a citation, such as [CIT2009]_, please check the source code to see how this is done. Note that
+If you want to add a citation, such as [CIT2009b]_, please check the source code to see how this is done. Note that
 citations may get rearranged, e.g., to the bottom of the "page".
 
 .. [CIT2009b] This is a citation (as often used in journals).