Update Features.md

[cadirol]

Hatteras Overdue DSLAM was written wrong!
Correct: Overture Hatteras DSLAM

Please give a short description what your pull request is for

Just an documentary Update!

DO NOT DELETE THE UNDERLYING TEXT

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[CLAassistant]

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[murrant]

These were generated from files, perhaps it would be good to correct them :)

https://github.com/librenms/librenms/blob/master/includes/definitions/hatteras.yaml

[cadirol]

Created PR in #16054