ISF_HepMC_Tools: cmake fix

Fix typo: CLHEP_INLCUDE_DIRS -> CLHEP_INCLUDE_DIRS

This merge request affects 1 package:

• Simulation/ISF/ISF_HepMC/ISF_HepMC_Tools

This merge request affects 1 file:

• Simulation/ISF/ISF_HepMC/ISF_HepMC_Tools/CMakeLists.txt

Adding @jchapman as watcher

added Simulation main review-pending-level-1 labels

CI Result SUCCESS (hash f160f28b)

	Athena	AthSimulation
externals
cmake
make
tests

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Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
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merged

mentioned in commit 23acd7a0