Sangoma phone firmware 2.0.4.91 release notes

Does anyone has the release notes for 2.0.4.91?

I show this version available in EPM with the v1.69 Sangoma firmware package. I normally check https://wiki.freepbx.org/display/PHON/Phone+Firmware+Release+Notes for the release notes, but 2.0.4.91 is not listed.