ci: use older VS Code version for integration testing
VS Code 1.64.0 and higher is failing to run our tests on Windows runner. https://github.com/microsoft/vscode/issues/142316#issuecomment-1033562057
This MR temporarily downgrades the VS Code version used for testing to 1.63.2.
Related to #534 (closed)
Edited by Tomas Vik (OOO back on 2024-09-23)