fix order of fastjet libraries for UB linker

[gaede]

BEGINRELEASENOTES

• fix order of fastjet libraries at linking step - needed on Ubuntu systems
• fixes https://github.com/iLCSoft/iLCInstall/issues/128

ENDRELEASENOTES

[tmadlener]

Very interesting (and quite unexpected) that the order in a find_package call influences the linking behavior.

Could you rebase this onto the new master to pick up the new github actions workflows?

[gaede]

Probably not true for all find modules - but works here ;-) Thanks for updating the CI.