fix: revert incorrect patch version bump

Author: BobBorges

CITATION.cff

@@ -1,7 +1,7 @@
 cff-version: 1.2.0
 message: To cite this repository, please use these metadata.
 title: "The Swedish Parliament Corpus: Riksdagen Records"
-version: v1.5.1
+version: v1.5.0
 authors:
   - given-names: Väinö
     family-names: Yrjänäinen