Update csrankings-r.csv

csrankings-r.csv

@@ -1027,6 +1027,7 @@ Robert Stevens 0001,University of Manchester,https://www.research.manchester.ac.
 Robert Strzodka,Heidelberg University,https://www.physik.uni-heidelberg.de/personen/lsf.php?details=25474,NOSCHOLARPAGE
 Robert Sámal,Charles University,https://iuuk.mff.cuni.cz/~samal,kSEwBlUAAAAJ
 Robert T. Collins,Pennsylvania State University,http://www.cse.psu.edu/~rtc12,2Bc3UN4AAAAJ
+Robert T. Loftin,University of Sheffield,https://www.sheffield.ac.uk/cs/people/academic/robert-loftin,ttJ9AWAAAAAJ
 Robert Tappan Morris,Massachusetts Institute of Technology,https://pdos.csail.mit.edu/~rtm,NOSCHOLARPAGE
 Robert V. Kenyon,University of Illinois at Chicago,https://www.cs.uic.edu/bin/view/Kenyon/WebHome,NOSCHOLARPAGE
 Robert W. Doran,University of Auckland,https://www.cs.auckland.ac.nz/~bob,NwTYDFwAAAAJ