review packaging-support page

[boegel]

https://docs.easybuild.io/packaging-support

[PetrKralCZ]

Maybe we should update the easyconfig (FPM-1.3.3-Ruby-2.1.6.eb) used for packaging first?

[boegel]

@PetrKralCZ Sure, makes sense

[PetrKralCZ]

• {tools}[GCCcore/12.2.0] FPM v1.15.1 w/ Ruby 3.2.2 easybuild-easyconfigs#19144
• packaging-support page review #228