Update Chris Xiaoxuan Lu's affiliation to UCL (#8058)

* update csrankings-x.csv

* Update Chris Xiaoxuan Lu’s affiliation from Edinburgh to UCL

* remove space after comma

---------

Co-authored-by: LuXiaoxuan <[email protected]>

csrankings-c.csv

@@ -768,7 +768,7 @@ Chris W. Johnson 0001,University of Glasgow,http://www.dcs.gla.ac.uk/~johnson,pU
 Chris Watkins,Royal Holloway University of London,https://pure.royalholloway.ac.uk/portal/en/persons/chris-watkins_09225e27-7a15-4edc-a087-69efb68c65c0.html,v8QhiOwAAAAJ
 Chris Wilson,University of Oregon,http://ix.cs.uoregon.edu/~cwilson,NOSCHOLARPAGE
 Chris Wojtan,IST Austria,http://pub.ist.ac.at/group_wojtan,OGdXlpcAAAAJ
-Chris Xiaoxuan Lu,University of Edinburgh,https://christopherlu.github.io,idu78-EAAAAJ
+Chris Xiaoxuan Lu,University College London,https://christopherlu.github.io,idu78-EAAAAJ
 Christan Earl Grant,University of Oklahoma,http://www.ou.edu/coe/cs/people/cgrant,NOSCHOLARPAGE
 Christan Grant,University of Oklahoma,http://www.ou.edu/coe/cs/people/cgrant,NOSCHOLARPAGE
 Christel Baier,TU Dresden,https://wwwtcs.inf.tu-dresden.de/~baier,p8sX7r0AAAAJ

csrankings-x.csv

@@ -291,7 +291,6 @@ Xiaowen Yuan,Massey University,https://www.massey.ac.nz/massey/learning/colleges
 Xiaowen Zhang,CUNY,http://www.csi.cuny.edu/faculty/ZHANG_XIAOWEN.html,vX1p5wIAAAAJ
 Xiaoxi He,University of Macau,https://www.fst.um.edu.mo/people/xiaoxi/,jkhl0fUAAAAJ
 Xiaoxing Ma,Nanjing University,http://ics.nju.edu.cn/people/xiaoxingma,44WpWR4AAAAJ
-Xiaoxuan Lu 0001,University College London,https://christopherlu.github.io,idu78-EAAAAJ
 Xiaoxue Ren,Zhejiang University,https://xiaoxuerens.github.io/,mdoN_woAAAAJ
 Xiaoxue Wu 0001,Yangzhou University,https://risame.github.io/wxx/,NOSCHOLARPAGE
 Xiaoyan Hong,The University of Alabama,http://cs.ua.edu/people/xhong,NOSCHOLARPAGE