fix typos in user guide

[kramred]

Thanks for contributing, make sure you address all the checklists (for details on how see

development documentation)!

• updated/extended the documentation
• ran the linter to address style issues (tox -e fix_lint)
• wrote descriptive pull request text
• ensured there are test(s) validating the fix
• added news fragment in docs/changelog folder

---

Hi, this PR contains mainly fixes for typos in the user guide page of the documentation.

Some sections could benefit (i.e. become better understandable) from a style check by a native English speaker (who also understands the technical parts) – but my first (combined) edits vanished in a software crash, and I'm not a native speaker, so I've limited this PR mainly to typos.

[codecov]

Codecov Report

Merging #2070 (a943936) into main (4740930) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2070      +/-   ##
==========================================
- Coverage   93.69%   93.63%   -0.07%     
==========================================
  Files          88       88              
  Lines        4380     4380              
==========================================
- Hits         4104     4101       -3     
- Misses        276      279       +3     

Flag	Coverage Δ
tests	93.63% <ø> (-0.07%)	⬇️

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

Impacted Files	Coverage Δ
src/virtualenv/util/path/_pathlib/__init__.py	93.93% <0.00%> (-3.04%)	⬇️
...nv/create/via_global_ref/builtin/cpython/mac_os.py	83.97% <0.00%> (-1.11%)	⬇️

---

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 4740930...a943936. Read the comment docs.

[gaborbernat]