Fix Sphinx build warnings #8686
Merged
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doc/faq/a06-global-build-options.rst: WARNING: document isn't included in any toctree
ref. https://www.sphinx-doc.org/en/master/usage/restructuredtext/field-lists.html#special-metadata-fields
same as other a#-... .rst pages
doc/faq/readme.rst:190: WARNING: Inline literal start-string without end-string.
just a typo