Update Changelog

Author: aeisenberg

extensions/ql-vscode/CHANGELOG.md

@@ -4,6 +4,7 @@
 
 - Prints end-of-query evaluator log summaries to the Query Log. [#1349](https://github.com/github/vscode-codeql/pull/1349)
 - Be consistent about casing in Query History menu. [#1369](https://github.com/github/vscode-codeql/pull/1369)
+- Fix quoting string columns in exported CSV results. [#1379](https://github.com/github/vscode-codeql/pull/1379)
 
 ## 1.6.6 - 17 May 2022