Infra: Escape contributor name using zero-width space

The initial "A." makes ReStructured Text think it's a beginning of
an ordered list, with headings A., B., C., etc.
The result looks bad and is semantically wrong.

The standard way to escape is using a backslash, "A\.". This looks
bad when viewing the source.

Another way is to use a zero-width space. This is invisible when
rendered and in some editors, but more paranoid text-oriented tools
render it as "<U+200B>A." (less) or "<200b>A." (vim).
But, it's outside the name, which makes it a better solution than "A\."

README

@@ -102,7 +102,7 @@ These very kind people have supplied patches or suggested changes:
 
 These people contributed to Python 3 porting (at https://github.com/pyldap/):
 
-* A. Karl Kornel
+* ​A. Karl Kornel
 * Alex Willmer
 * Aymeric Augustin
 * Bradley Baetz