Minor tweaks

Author: Mantas Mikaitis

citation.bib

@@ -8,7 +8,7 @@ @techreport{himi21a
   number = "2021.15",
   pages = "31",
   month = oct,
-  year = "2021",
+  year = 2021,
   url = "http://eprints.maths.manchester.ac.uk/2834/"
 }
 
@@ -22,6 +22,6 @@ @techreport{himi21b
   number = "2021.16",
   pages = "20",
   month = oct,
-  year = "2021",
+  year = 2021,
   url = "http://eprints.maths.manchester.ac.uk/2835/"
 }