chore: add changelog entry for #1814

Author: andreynering

CHANGELOG.md

@@ -7,6 +7,8 @@
 - Fixed a bug where the help was displayed twice (#1805, #1806 by @vmaerten).
 - Fixed a bug where ZSH and PowerShell completions did not work when using the
   recommended method. (#1813, #1809 by @vmaerten and @shirayu)
+- Fix variables not working properly for a `defer:` statement (#1803, #1814 by
+  @vmaerten and @andreynering).
 
 ## v3.39.0 - 2024-09-07