Bump pybind

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

symforce/pybind/CMakeLists.txt

@@ -9,16 +9,16 @@
 
 include(FetchContent)
 
-find_package(pybind11 2.9.2 QUIET)
+find_package(pybind11 2.13.6 QUIET)
 if (NOT pybind11_FOUND)
   message(STATUS "pybind11 not found, adding with FetchContent")
   # NOTE(brad): Set PYTHON_EXECUTABLE to ensure pybind11 uses the same
   # python as the rest of symforce.
   set(PYTHON_EXECUTABLE ${SYMFORCE_PYTHON})
   FetchContent_Declare(
     pybind11
-    URL https://github.com/pybind/pybind11/archive/v2.9.2.zip
-    URL_HASH SHA256=d1646e6f70d8a3acb2ddd85ce1ed543b5dd579c68b8fb8e9638282af20edead8
+    URL https://github.com/pybind/pybind11/archive/v2.13.6.zip
+    URL_HASH SHA256=d0a116e91f64a4a2d8fb7590c34242df92258a61ec644b79127951e821b47be6
   )
   FetchContent_MakeAvailable(pybind11)
 else()