docs: Add general citation from Florian Bury's Ph.D. thesis (#2092)

* Add general citation from 'Application of deep learning techniques in
  CMS: from matrix element regression to the search for Higgs boson pair
  production'.
   - c.f. https://inspirehep.net/literature/2621189
   - Ph.D. dissertation of Florian Bury

docs/bib/general_citations.bib

@@ -1,3 +1,13 @@
+% 2022-12-12
+@phdthesis{Bury:2022okd,
+    author = "Bury, Florian",
+    title = "{Application of deep learning techniques in CMS: from matrix element regression to the search for Higgs boson pair production}",
+    school = "Universit{\'e} catholique de Louvain",
+    month = "12",
+    year = "2022",
+    url = "https://inspirehep.net/literature/2621189"
+}
+
 % 2022-12-09
 @article{Aly:2022zaa,
     author = "Aly, Mohamed and others",