docs: Add language tag to known issues in README

Author: kiriDevs

README.md

@@ -6,5 +6,5 @@ I made it mainly to show off (lol) - that's also why this repo isn't really
 structured to allow solutions of multiple people or anything like that.
 
 ## Current issues
-- 2021, Day 11 (Part 1): Logging indentation is messed up
-- 2021, Day 11 (Part 2): Logging indentation is messed up
+- 2021, Day 11 (Part 1) [py]: Logging indentation is messed up
+- 2021, Day 11 (Part 2) [py]: Logging indentation is messed up