Change readme footnote character

Author: rdtsc

readme.md

@@ -1,14 +1,14 @@
 # CodeEval Problem Statements
 
 As of 2018-02-12, [CodeEval][ce] has ceased operations. This (unofficial)
-repository mirrors* the problem statements for all 239† interactive challenges
+repository mirrors* the problem statements for all 239‡ interactive challenges
 that once lived on the platform.
 
 <p>
   <sup>* A couple of problem statements are missing animated GIFs which I don't
   have a backup of.</sup>
   <br>
-  <sup>† Challenge #127 ("Code Plagiarism") is not included because no points
+  <sup>‡ Challenge #127 ("Code Plagiarism") is not included because no points
   were awarded for it by the online evaluation system.</sup>
 </p>