Docs: Update changelog

Changelog.md

@@ -45,6 +45,7 @@ OpenCore Changelog
 - Added =/+ key as alias for CTRL to set default OS
 - Added additional support for configuring correct key repeat behaviour with KeySupport mode
 - Fixed CPU multiplier detection on pre-Nehalem Intel CPUs
+- Fixed incorrect handling of multiple processors and processor cache in SMBIOS
 
 #### v0.6.7
 - Fixed ocvalidate return code to be non-zero when issues are found