docs: Add use citation from Gauge SU(2)f flavour paper (#2259)

* Add use citation from 'Gauge SU(2)f flavour transfers'.
   - c.f. https://inspirehep.net/literature/2678488

docs/bib/use_citations.bib

@@ -1,3 +1,16 @@
+% 2023-07-18
+@article{Darme:2023nsy,
+    author = "Darm\'e, Luc and Deandrea, Aldo and Mahmoudi, Farvah",
+    title = "{Gauge $SU(2)_f$ flavour transfers}",
+    eprint = "2307.09595",
+    archivePrefix = "arXiv",
+    primaryClass = "hep-ph",
+    reportNumber = "CERN-TH-2023-139",
+    month = "7",
+    year = "2023",
+    journal = ""
+}
+
 % 2023-07-13
 @article{Araz:2023bwx,
     author = "Araz, Jack Y.",