update `make docs` for local

[Borda]

Before submitting

• [ ] Was this discussed/approved via a Github issue? (no need for typos and docs improvements)
• [ ] Did you make sure to update the docs?
• [ ] Did you write any new necessary tests?

What does this PR do?

add instruction on how to dry run all notebooks for local make docs

PR review

Anyone in the community is free to review the PR once the tests have passed. If we didn't discuss your PR in Github issues there's a high chance it will not be merged.

Did you have fun?

Make sure you had fun coding 🙃

[codecov[bot]]

Codecov Report

Merging #156 (d392680) into main (c257c46) will not change coverage. The diff coverage is n/a.

@@         Coverage Diff         @@
##           main   #156   +/-   ##
===================================
  Coverage    75%    75%           
===================================
  Files         2      2           
  Lines       355    355           
===================================
  Hits        267    267           
  Misses       88     88