Bump github/codeql-action from 3.25.15 to 3.26.8 #5687

Job	Run time
clang-format	19s
cppcheck	8m 5s
copyright_headers	18s
forbidden_types	14s
lychee_IGNORED	28s
rstcheck	21s
unused_names	15s
vale	31s
black	34s
flake8	21s
isort	11s
mypy	33s
pydocstyle	22s
pylint	39s
sphinx-rtd	3m 21s
sphinx-conda	0s
build_macos (macos-latest, clang, openmp, mpi, python, gsl, ltdl, boost, hdf5, optimize, warning)	12m 17s
build_linux (ubuntu-22.04, gcc, boost, optimize, warning)	14m 1s
build_linux (ubuntu-22.04, gcc, openmp, python, gsl, ltdl, boost, optimize, warning)	18m 3s
build_linux (ubuntu-22.04, gcc, mpi, python, gsl, ltdl, boost, optimize, warning)	20m 12s
build_linux (ubuntu-22.04, gcc, openmp, mpi, python, gsl, ltdl, boost, hdf5, sionlib, libneurosim...	31m 26s
	1h 52m 31s

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