Dont use a Sphinx version later than 7.1.2 (#1990)

Summary:
Pull Request resolved: #1990

Sphinx 7.2.0 or later leads to doc build failures.

Reviewed By: esantorella

Differential Revision: D48487417

fbshipit-source-id: d2ceafa62e94f6a19f82529e868bd342cb691eb9

setup.py

@@ -68,7 +68,7 @@ def read_deps_from_file(filname):
 # Read in pinned versions of the formatting tools
 FMT_REQUIRES += read_deps_from_file("requirements-fmt.txt")
 # Dev is test + formatting + docs generation
-DEV_REQUIRES = TEST_REQUIRES + FMT_REQUIRES + ["sphinx"]
+DEV_REQUIRES = TEST_REQUIRES + FMT_REQUIRES + ["sphinx<=7.1.2"]
 
 # read in README.md as the long description
 with open(os.path.join(root_dir, "README.md"), "r") as fh: