Corrected Mis-Formatted Reference Links

The in-line style was breaking link display on the website.

Author: BethanyG

exercises/concept/card-games/.docs/hints.md

@@ -41,8 +41,8 @@
 - Python provides a wide range of [ways to modify `lists`][ways to modify `lists`].
 
 
-[common sequence operations](https://docs.python.org/3/library/stdtypes.html#sequence-types-list-tuple-range)
-[constructed](https://docs.python.org/3/library/stdtypes.html#list)
-[iterate over a list in python](https://www.geeksforgeeks.org/iterate-over-a-list-in-python/)
-[return](https://www.w3schools.com/python/ref_keyword_return.asp)
-[ways to modify `lists`](https://realpython.com/python-lists-tuples/#lists-are-mutable)
+[common sequence operations]: https://docs.python.org/3/library/stdtypes.html#sequence-types-list-tuple-range
+[constructed]: https://docs.python.org/3/library/stdtypes.html#list
+[iterate over a list in python]: https://www.geeksforgeeks.org/iterate-over-a-list-in-python/
+[return]: https://www.w3schools.com/python/ref_keyword_return.asp
+[ways to modify `lists`]: https://realpython.com/python-lists-tuples/#lists-are-mutable