Fix docs esp32

[serg3295]

Fixes #\<GitHub-issue-number>.

Make sure all boxes are checked (add x inside the brackets) when you submit your contribution, remove this sentence before doing so.

• [ x] This PR is for the dev branch rather than for the release branch.
• [ x] This PR is compliant with the other contributing guidelines as well (if not, please describe why).
• [ x] I have thoroughly tested my contribution.
• [ x] The code changes are reflected in the documentation at docs/*.

ledc.md - formatting, add object name otaupgrade.md - formatting, add 'Syntax' section pulsecnt.md - formatting, fix syntax pulsecnt.create, add object name sdmmc.md - fix typos sjson.md - formatting, add 'Parameters' section touch.md - formatting, add object name, fix Returns in tp:read()