Build(deps): bump ansys-sphinx-theme from 1.2.6 to 1.3.1 in /requirem… #221

Job	Run time
Build the python-rest-client docker image	1m 27s
Build the python-rest-server docker image	1m 24s
Build the python-grpc-client docker image	1m 23s
Build the python-grpc-server docker image	1m 24s
Build the cpp-rest-client docker image	4m 0s
Build the cpp-rest-server docker image	2m 5s
Build the cpp-grpc-client docker image	13m 37s
Build the cpp-grpc-server docker image	10m 50s
	36m 10s

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