doc: Do not use Sphinx 5.2.0.post0

Sphinx 5.2.0.post0 release has a known compatibility issue with the
`sphinx_rtd_theme` (see the issue readthedocs/sphinx_rtd_theme#1343).

Revert this commit once this compatibility issue is resolved.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

scripts/requirements-doc.txt

@@ -1,7 +1,7 @@
 # DOC: used to generate docs
 
 breathe>=4.34
-sphinx~=5.0
+sphinx~=5.0,!=5.2.0.post0
 sphinx_rtd_theme~=1.0
 sphinx-tabs
 sphinxcontrib-svg2pdfconverter