docs: Add citation from Run 2 Reinterpretation of LHC Results paper (#…

…809)

* Add use citation from Reinterpretation of LHC Results for New Physics: Status and Recommendations after Run 2
   - c.f. https://inspirehep.net/record/1785921

docs/bib/use_citations.bib

@@ -1,3 +1,18 @@
+@article{Abdallah:2020pec,
+      author         = "Abdallah, Waleed and others",
+      title          = "{Reinterpretation of LHC Results for New Physics: Status
+                        and Recommendations after Run 2}",
+      collaboration  = "LHC Reinterpretation Forum",
+      year           = "2020",
+      eprint         = "2003.07868",
+      archivePrefix  = "arXiv",
+      primaryClass   = "hep-ph",
+      reportNumber   = "CERN-LPCC-2020-001, FERMILAB-FN-1098-CMS-T,
+                        Imperial/HEP/2020/RIF/01",
+      SLACcitation   = "%%CITATION = ARXIV:2003.07868;%%",
+      journal        = ""
+}
+
 @inproceedings{Brooijmans:2020yij,
       author         = "Brooijmans, G. and others",
       title          = "{Les Houches 2019 Physics at TeV Colliders: New Physics