Updated Changelog (markdown)

Changelog.md

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 # Ryujinx Changelog
 All updates to the Ryujinx official master build will be documented in this file
 
+## 1.0.6521 - 2021-02-07
+### Fixed
+- Fixed non-contiguous IPC memory copies.
+  - Fixes a specific crash on Bravely Default II Demo, Balan Wonderworld Demo, and possibly other games introduced in 1.0.5899 (PR #1458)
+
+## 1.0.6520 - 2021-02-07
+### Changed
+- Optimised JIT code generation to reduce register utilisation.
+  - This change may provide a minor improvement in code compilation time and quality.
+
+## 1.0.6519 - 2021-02-07
+### Changed
+- Simplified code generation when using multiple vertex shader programs.
+  - This is a code style change, and should not have any impact on emulator performance.
+
+## 1.0.6518 - 2021-02-07
+### Changed
+- Fixed the updater application icon on Linux.
+
+## 1.0.6517 - 2021-02-07
+### Changed
+- Disabled partial JIT invalidation on un-map.
+  - Fixes a significant performance regression in some games introduced by 1.0.6096 (PR #1518).
+
+## 1.0.6516 - 2021-02-07
+### Added
+- Added support for the ETC2 (RGB) texture format.
+  - Fixes corrupt textures in Vegas Party.
+
 ## 1.0.6471 - 2021-02-01
 ### Changed
 - Disabled flushing of multisample textures.