Bump sphinx from 5.1.0 to 5.1.1 in /docs (#691)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -1,4 +1,4 @@
 furo==2022.6.21
-sphinx==5.1.0
+sphinx==5.1.1
 sphinx-click==4.3.0
 myst_parser==0.18.0