(README) fix: Remove extra char from pagination code sample (#124)

Author: Haider8

README.rst

@@ -122,7 +122,7 @@ Subclass this pagination to define custom default & maximum values for offset &
  class CustomPagination(Pagination):
  default_offset = 90
  default_limit = 1
- max_offset = 100`
+ max_offset = 100
  max_limit = 2000