[coreboot-gerrit] Change in coreboot[master]: Documenation: Add several fixes

[Paul Menzel (Code Review)]

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/41492 )

Change subject: Documenation: Add several fixes
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Patch Set 1: Code-Review+1

(2 comments)

https://review.coreboot.org/c/coreboot/+/41492/1//COMMIT_MSG 
Commit Message:

https://review.coreboot.org/c/coreboot/+/41492/1//COMMIT_MSG@9 
PS1, Line 9: * Add support for Sphinx 3.0+
Shorter:
> Support Sphinx 3.0+

https://review.coreboot.org/c/coreboot/+/41492/1//COMMIT_MSG@11 
PS1, Line 11: * Make sphinxcontrib ditaa an option extension
optional