Check docs are up to date

[ErikSchierboom]

Please check if your documentation files are still up-to-date.

The key documentation files to check are:

• docs/ABOUT.md
• docs/INSTALLATION.md
• docs/LEARNING.md
• docs/RESOURCES.md
• docs/TESTS.md
• exercises/shared/.docs/help.md
• exercises/shared/.docs/tests.md

There might be more.

Link check report

To help identify invalid links, we've automatically checked the links of all *.md files in this repo. This is the report of that check:

📝 Summary
---------------------
🔍 Total...........63
✅ Successful......61
⏳ Timeouts.........1
🔀 Redirected.......0
👻 Excluded.........0
🚫 Errors...........1

Errors in ./docs/RESOURCES.md
✗ http://www.elsman.com/mlkit/ (error sending request for url (http://www.elsman.com/mlkit/): error trying to connect: dns error: failed to lookup address information: Name or service not known)

Errors in ./docs/LEARNING.md
⧖ http://www.soc.napier.ac.uk/course-notes/sml/manual.html

Tracking

https://github.com/exercism/v3-launch/issues/54

[kahgoh]

@ErikSchierboom The URL http://www.elsman.com/mlkit/ seems to work now. #309 updates the other link.