Bump codercom/code-server in /extensions/ql-vscode/test/e2e/docker

Bumps codercom/code-server from 4.139.1 to 4.139.1-39.

---
updated-dependencies:
- dependency-name: codercom/code-server
  dependency-version: 4.139.1-39
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

extensions/ql-vscode/test/e2e/docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM codercom/code-server:4.139.1
+FROM codercom/code-server:4.139.1-39
 
 USER root