docs: Correct typo in integrated terminal bug fix description in release notes

Author: hannesrudolph

docs/update-notes/v3.15.1.md

@@ -6,7 +6,7 @@ This patch release includes several bug fixes and quality-of-life improvements.
 
 *   Made retries respect the global auto-approve checkbox.
 *   Fixed a selection mode bug in the history view (thanks jr!).
-*   Fixed the new intigrated terminal to capture stderr in execa-spawned processes.
+*   Fixed the new integrated terminal to capture stderr in execa-spawned processes.
 
 ## QOL Improvements