fix small typos

[mercuryseries]

Changelogs

• fixed small typos and wrong markdown links.

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Checklist:

• [ ] Was this PR discussed in an issue? It is recommended to first discuss a new feature into a GitHub issue before opening a PR.
• [ ] Add tests to cover the fixed bug(s) or the new introduced feature(s) (if appropriate).
• [ ] Update the API documentation is a new function is added, or an existing one is deleted.
• [ ] Write concise and explanatory changelogs below.
• [ ] If possible, assign one of the following labels to the PR: feature, fix or test (or ask a maintainer to do it for you).

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discussion related to that PR

[codecov[bot]]

Codecov Report

Merging #207 (f1c6681) into main (6ec1615) will decrease coverage by 0.03%. The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #207      +/-   ##
==========================================
- Coverage   92.09%   92.07%   -0.03%     
==========================================
  Files          46       46              
  Lines        3809     3809              
==========================================
- Hits         3508     3507       -1     
- Misses        301      302       +1     

Flag	Coverage Δ
unittests	92.07% <ø> (-0.03%)	:arrow_down:

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
datamol/conformers/_conformers.py	93.16% <ø> (ø)

... and 1 file with indirect coverage changes

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