Missing citation reference links

[glemieux]

Two citations are missing accompanying references and returning as an undefined label warning during the build process:

fates-docs/docs/source/fates_tech_note.rst

Line 3507 in 0ef0a20

(:ref:`Sist et al., 2015<sistetal2015>`). Disturbances that result from logging are known to

fates-docs/docs/source/fates_tech_note.rst

Line 3606 in 0ef0a20

(:ref:`Palace et al., 2008 <palaceetal2008>`) by modifying the live biomass pools and flow of

[ckoven]

palace et al is this: https://esajournals.onlinelibrary.wiley.com/doi/full/10.1890/06-2022.1

[ckoven]

Sist et al is this I think: https://onlinelibrary.wiley.com/doi/full/10.1111/avsc.12125