Update sphinx requirement from ~=2.2.0 to ~=4.3.0#18

dependabot[bot] wants to merge 1 commit intomasterbyronlin13/amazon-qldb-driver-python:masterfrom

dependabot/pip/master/sphinx-approx-eq-4.3.0byronlin13/amazon-qldb-driver-python:dependabot/pip/master/sphinx-approx-eq-4.3.0Copy head branch name to clipboard