Update nanobind to 2.4.0

To run the testing, add a comment with:

Bot test PACKAGE[ PACKAGE2 ...]|all in TOOLCHAIN|all [(only|also) for ARCH-LABEL-COMPILER-BUILDTYPE] please!

later followed by

Bot repeat please!

To ensure patches required for existing LCG branches are not lost, please add the respective labels: alsoTargeting:LCG_102-patches, alsoTargeting:master, etc.

cmake/toolchain/heptools-dev-base.cmake

@@ -498,7 +498,7 @@ LCG_external_package(mypy_extensions   1.0.0
 LCG_external_package(mysql             10.5.20                                  )
 LCG_external_package(mysql_connector_python 8.0.18                            )
 LCG_external_package(namex             0.0.8                                    )
-LCG_external_package(nanobind          2.2.0                                    )
+LCG_external_package(nanobind          2.4.0                                    )
 LCG_external_package(nanomsg           1.1.5                                    )
 LCG_external_package(nbclassic         0.3.1                                    )
 LCG_external_package(nbclient          0.5.3                                    )