Grouping issue: Bugs in `lexmatch/README.md` goal / `lexmatch-sssom-compare.py`

[joeflack4]

Sub-task list

• [ ] 1. unmapped_icd11foundation_lex_exact: Link for it points to wrong file
• [ ] 2. unmapped_icd11foundation_lex_exact: Row count is wrong
• [ ] 3. #177
• [ ] 4. #540
• [ ] 5. #206
• [ ] 6. #523
• [ ] 7. #484

Additional info

Related to sub-tasks (1) and (2): Slack thread. And they can be seen in this diff)

[joeflack4]

@hrshdhgd is away, but if he gets back before I get to this, it might go onto his plate!