Fix notebook paths

[williambrandler]

What changes are proposed in this pull request?

Fixing the relative notebook paths as per, https://github.com/readthedocs/readthedocs.org/issues/8682

.. notebook:: . tertiary/1_quality_control.html not: .. notebook:: .. tertiary/1_quality_control.html

Also fixed some minor typos / wording

How is this patch tested?

• [ ] Unit tests
• [ ] Integration tests
• [ ] Manual tests

(Details)

[codecov[bot]]

Codecov Report

Merging #448 (8f171c2) into master (9348a48) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #448   +/-   ##
=======================================
  Coverage   93.63%   93.63%           
=======================================
  Files          95       95           
  Lines        4824     4824           
  Branches      466      466           
=======================================
  Hits         4517     4517           
  Misses        307      307           

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 9348a48...8f171c2. Read the comment docs.