Bump pybind

[aaron-skydio]

Fixes #425

Our previous version of pybind didn't support py3.11. pybind 2.13.6
supports all versions of python that we support. There isn't much
downside to downloading an additional copy of pybind if you have an
older one installed that supports your version of python. If we wanted
to we could write some table of minimum required versions based on
SYMFORCE_PYTHON's version

Topic: sf-pybind
Relative: fix-wheels

[aaron-skydio]

Reviews in this chain:
└#427 Fix wheel builds
　└#426 Bump pybind

[aaron-skydio]

#	head	base	diff	date	summary
0	15a2ace2	d1ced097	diff	Feb 23 23:48 PM	1 file changed, 3 insertions(+), 3 deletions(-)
1	6635b417	d1ced097	diff	Feb 24 0:48 AM	2 files changed, 37 insertions(+)
2	c59bca28	d1ced097	diff	Feb 24 1:41 AM	1 file changed, 4 insertions(+), 4 deletions(-)
3	7e46e98d	8e53c70b	diff	Feb 24 11:12 AM	4 files changed, 3 insertions(+), 39 deletions(-)