Docs: Sync pdf and changelog

Changelog.md

@@ -6,6 +6,7 @@ OpenCore Changelog
 - Added `ForceAquantiaEthernet` for Aquantia AQtion AQC-107s based 10GbE network cards support, thx @Mieze and @Shikumo
 - Updated builtin firmware versions for SMBIOS and the rest
 - Added `Misc` -> `Serial` section to customise serial port properties
+- Added `CustomPciSerialDevice` quirk for XNU to correctly recognise customised external serial devices
 
 #### v0.7.9
 - Added auto-detect `macOS Installer` volume name for use when `.disk_label` file cannot be displayed

Docs/Differences/Differences.tex

 \documentclass[]{article}
 %DIF LATEXDIFF DIFFERENCE FILE
 %DIF DEL PreviousConfiguration.tex   Thu Mar 10 21:36:27 2022
-%DIF ADD ../Configuration.tex        Wed Apr 13 11:28:36 2022
+%DIF ADD ../Configuration.tex        Thu Apr 14 12:58:52 2022
 
 \usepackage{lmodern}
 \usepackage{amssymb,amsmath}