ci: enforce build of new py-pybind11

spack.yaml

@@ -30,6 +30,7 @@ spack:
     - py-pyaescrypt
     - py-formencode
     - tvb-framework ^binutils+ld+gold
+    - py-pybind11@2.10.1:
     - pynn-brainscales@4.0-a1 ^log4cxx@0.10.0 ^googletest@1.11.0:+gmock
     - hxtorch@4.0-a1 ^log4cxx@0.10.0 ^googletest@1.11.0:+gmock
     - py-neo