Bump sphinx from 8.1.1 to 8.1.3 in /cmake/tribits/doc/sphinx #2127

Job	Run time
build-deps (gnu, V114, 4.9.2, 4.4.0)	44s
build-deps (clang, V114, 4.9.2, 4.4.0)	1m 0s
build-deps (mpi, V114, 4.9.2, 4.4.0)	57s
Debug serial build	6m 4s
Debug parallel build	6m 52s
Threadsafe ON, No Fortran	4m 27s
Threadsafe ON, Parallel, No Fortran	5m 13s
Sanitize address, no fortran	6m 24s
Sanitize undefined	7m 13s
Sanitize integer	4m 56s
GTest Enabled	5m 59s
No applications, legacy, or fortran	4m 11s
CATALYST2, parallel	9m 9s
KOKKOS, parallel	8m 33s
No deprecated exodus functions	7m 52s
Use modern CMake configure of netCDF and HDF5 packages with GTest	8m 56s
ADIOS2 enabled	11m 56s
FAODEL and METIS enabled	12m 10s
C++20 build serial clang	6m 58s
C++20 build serial gnu	7m 24s
C++20 build parallel	8m 20s
	2h 15m 18s

Provide feedback