[6.x] update changelog

Author: TBlindaruk

CHANGELOG-6.x.md

@@ -1,6 +1,12 @@
 # Release Notes for 6.x
 
-## [Unreleased](https://github.com/laravel/framework/compare/v6.18.34...6.x)
+## [Unreleased](https://github.com/laravel/framework/compare/v6.18.35...6.x)
+
+
+## [v6.18.35 (2020-08-07)](https://github.com/laravel/framework/compare/v6.18.34...v6.18.35)
+
+### Changed
+- Verify column names are actual columns when using guarded ([#33777](https://github.com/laravel/framework/pull/33777))
 
 
 ## [v6.18.34 (2020-08-06)](https://github.com/laravel/framework/compare/v6.18.33...v6.18.34)