docs: update tomee installation section

[jeshernandez]

Small update

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[jamespilgrim]

Hi there - sorry to ask this, but when you have a minute, can you just double-check the changes you made to "Raspberry Pi Setup and Configuration.md" to make sure I (JP) didn't make any changes that screwed up something? I did a merge of some changes that I was making, and I'm pretty new at doing merges in GitHub. Hopefully my stuff didn't mess up anything you had done?
Thank you!