v0.12.0.md

@@ -8,6 +8,16 @@
 
 ## Reviewer comments
 
+# `rho_p` from Fairhurst et al.
+
+## Related MRs
+
+* https://git.ligo.org/lscsoft/pesummary/-/merge_requests/528
+
+## Reviewer comments
+
+See sign off from Katerina here: https://git.ligo.org/lscsoft/pesummary/-/merge_requests/528#note_238699
+
 # `chi_p_2spin` from L. M. Thomas et al.
 
 ## Related MRs