Fix comment formatting in index.md

Author: cclauss

index.md

@@ -1,10 +1,10 @@
 # TheAlgorithms/Python
 
+<!-- CONTRIBUTING.md must be the FIRST doc, and README.md can come after. -->
 ```{toctree}
 :maxdepth: 2
 :caption: index.md
 
-<!-- CONTRIBUTING.md must be the FIRST doc and README.md can come after. -->
 CONTRIBUTING.md
 README.md
 LICENSE.md