docs: Add general use citation from IRIS-HEP Strategic Plan (#2107)

* Add general citation from 'IRIS-HEP Strategic Plan for the Next
  Phase of Software Upgrades for HL-LHC Physics'.
   - c.f. https://inspirehep.net/literature/2628983

docs/bib/general_citations.bib

@@ -1,3 +1,15 @@
+% 2023-02-02
+@article{Bockelman:2023gbj,
+    author = "Bockelman, Brian and Elmer, Peter and Watts, Gordon",
+    title = "{IRIS-HEP Strategic Plan for the Next Phase of Software Upgrades for HL-LHC Physics}",
+    eprint = "2302.01317",
+    archivePrefix = "arXiv",
+    primaryClass = "hep-ex",
+    month = "2",
+    year = "2023",
+    journal = ""
+}
+
 % 2022-12-12
 @phdthesis{Bury:2022okd,
     author = "Bury, Florian",