1.4.0-insiders2 changelog (#7536)

* Update changelog.

Extension/CHANGELOG.md

@@ -1,5 +1,21 @@
 # C/C++ for Visual Studio Code Change Log
 
+## Version 1.4.0-insiders2: May 17, 2021
+### New Features
+* Add a C++ walkthrough to the "Getting Started" page. [#7273](https://github.com/microsoft/vscode-cpptools/issues/7273)
+  * Currently, it's only usable when `"workbench.welcomePage.experimental.extensionContributions": true` is set with VS Code Insiders.
+
+### Bug Fixes
+* Fix an incorrect IntelliSense error with object initialization. [#3212](https://github.com/microsoft/vscode-cpptools/issues/3212)
+* Fix macros getting undefined when duplicate `#include` are used. [#5182](https://github.com/microsoft/vscode-cpptools/issues/5182], [#7270](https://github.com/microsoft/vscode-cpptools/issues/7270)
+* Fix IntelliSense crash with `#pragma GCC target`. [#6698](https://github.com/microsoft/vscode-cpptools/issues/6698), [#7377](https://github.com/microsoft/vscode-cpptools/issues/7377)
+* Fix completion at the end of a file. [#7472](https://github.com/microsoft/vscode-cpptools/issues/7472)
+* Fix completion of constructors. [#7505](https://github.com/microsoft/vscode-cpptools/issues/7505)
+* Fix IntelliSense crash with the arrow library. [#7518](https://github.com/microsoft/vscode-cpptools/issues/7518)
+* Fix the configuration UI randomly being blank (more frequently when remote). [#7523](https://github.com/microsoft/vscode-cpptools/issues/7523)
+* Fix IntelliSense mode switching from `linux` to `macos` if `__unix__` is defined but `__linux__` is not. [#7525](https://github.com/microsoft/vscode-cpptools/issues/7525)
+* Reduce IntelliSense memory and CPU usage in certain scenarios.
+
 ## Version 1.4.0-insiders: May 10, 2021
 ### Enhancements
 * Update to clang-format 12. [#6434](https://github.com/microsoft/vscode-cpptools/issues/6434)
@@ -12,6 +28,7 @@
 * Add support for exception conditions to cppvsdbg (see [documentation](https://aka.ms/VSCode-Cpp-ExceptionSettings) for more information)
 
 ### Bug Fixes
+* Fix IntelliSense errors with designated initializers. [#3491](https://github.com/microsoft/vscode-cpptools/issues/3491), [#5500](https://github.com/microsoft/vscode-cpptools/issues/5550)
 * Fix IntelliSense configuration with cl.exe compiler args `/external:I`, `/Zc:preprocessor`, and others. [#4980](https://github.com/microsoft/vscode-cpptools/issues/4980), [#6531](https://github.com/microsoft/vscode-cpptools/issues/6531), [#7259](https://github.com/microsoft/vscode-cpptools/issues/7259)
 * Fix provider failed error logging. [#5487](https://github.com/microsoft/vscode-cpptools/issues/5487)
 * Fix -idirafter directories being included too early. [#7129](https://github.com/microsoft/vscode-cpptools/issues/7129)
@@ -21,9 +38,9 @@
 * Fix clang-format formatting bug when new lines are removed. [#7360](https://github.com/microsoft/vscode-cpptools/issues/7360)
 * Change default cwd in launch.json to `${fileDirname}`. [#7362](https://github.com/microsoft/vscode-cpptools/issues/7362)
   * Syed Ahmad (@HackintoshwithUbuntu) [PR #7363](https://github.com/microsoft/vscode-cpptools/pull/7363)
-* Fix a crash on Linux with a `/**` includePath.
 * Fix the compile commands entry not being used when -Werror is used. [#7388](https://github.com/microsoft/vscode-cpptools/issues/7388)
 * Fix some potential race conditions during vsix installation. [#7405](https://github.com/microsoft/vscode-cpptools/issues/7405)
+* Fix a crash on Linux with a `/**` includePath.
 
 ## Version 1.3.1: April 19, 2021
 ### Bug Fixes