Merge pull request #270 from michalc/docs/no-abbreviate

docs: don’t abbreviate United Kingdom in citation

Author: michalc

CITATION.cff

@@ -18,4 +18,4 @@ preferred-citation:
   year: 2024
   month: 11
   title: "A Reusable Python Framework for Repeatable, Replicable, & Reproducible Experiments Using OpenTTD"
-  notes: "Master's dissertation, University of Edinburgh, UK"
+  notes: "Master's dissertation, University of Edinburgh, United Kingdom"