Update changelog. (#2003)

Author: sean-mcmanus

Extension/CHANGELOG.md

@@ -1,13 +1,14 @@
 # C/C++ for Visual Studio Code Change Log
 
-## Version 0.17.1: May 15, 2018
+## Version 0.17.1: May 17, 2018
 * Fix IntelliSense update slowness when using recursive includes. [#1949](https://github.com/Microsoft/vscode-cpptools/issues/1949)
 * Fix code navigation failure after switching between WSL and non-WSL configs. [#1958](https://github.com/Microsoft/vscode-cpptools/issues/1958)
 * Fix extension crash when the `includePath` is a file or the root drive. [#1979](https://github.com/Microsoft/vscode-cpptools/issues/1979), [#1965](https://github.com/Microsoft/vscode-cpptools/issues/1965)
 * Fix IntelliSense crash in `have_member_access_from_class_scope`. [#1763](https://github.com/Microsoft/vscode-cpptools/issues/1763)
 * Fix `#include` completion bugs. [#1959](https://github.com/Microsoft/vscode-cpptools/issues/1959), [#1970](https://github.com/Microsoft/vscode-cpptools/issues/1970)
 * Add `Debug` value for `loggingLevel` (previously the hidden value `"6"`).
 * Fix C++17 features not being fully enabled with msvc-x64 mode. [#1990](https://github.com/Microsoft/vscode-cpptools/issues/1990)
+* Fix IntelliSense interprocess deadlocks. [#1407](https://github.com/Microsoft/vscode-cpptools/issues/1407), [#1777](https://github.com/Microsoft/vscode-cpptools/issues/1777)
 
 ## Version 0.17.0: May 7, 2018
 * Auto-complete for headers after typing `#include`. [#802](https://github.com/Microsoft/vscode-cpptools/issues/802)