Update changelog again. (#13831)

* Update changelog again.

Author: sean-mcmanus

Extension/CHANGELOG.md

@@ -1,6 +1,6 @@
 # C/C++ for Visual Studio Code Changelog
 
-## Version 1.27.0: August 4, 2025
+## Version 1.27.0: August 7, 2025
 ### Bug Fixes
 * Fix an IntelliSense crash in `add_cached_tokens_to_string`. [#11900](https://github.com/microsoft/vscode-cpptools/issues/11900)
 * Fix an IntelliSense crash in `find_subobject_for_interpreter_address`. [#12464](https://github.com/microsoft/vscode-cpptools/issues/12464)
@@ -15,6 +15,9 @@
 * Fix `-imacro` not configuring IntelliSense correctly. [#13785](https://github.com/microsoft/vscode-cpptools/issues/13785)
 * Fix `pipeTransport.quoteArgs` not being handled correctly. [#13791](https://github.com/microsoft/vscode-cpptools/issues/13791)
   * Thank you for the contribution. [@mrjist (Matt)](https://github.com/mrjist) [PR #13794](https://github.com/microsoft/vscode-cpptools/pull/13794)
+* Fix `.txx` and `.tpp` not being handled as C++ header files. [#13808](https://github.com/microsoft/vscode-cpptools/issues/13808)
+* Fix an error when using GitHub Copilot with VS Code older than 1.90.0. [#13818](https://github.com/microsoft/vscode-cpptools/issues/13818)
+* Fix activation failing if the `c_cpp_properties.json` exists but fails to be opened. [#13829](https://github.com/microsoft/vscode-cpptools/issues/13829)
 * Fix an IntelliSense bug that could cause incorrect string lengths to be reported for string literals in files that use certain file encodings.
 
 ## Version 1.26.3: June 24, 2025