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

Bumps codercom/code-server from 4.107.0 to 4.108.0.

---
updated-dependencies:
- dependency-name: codercom/code-server
  dependency-version: 4.108.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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:4.107.0
+FROM codercom/code-server:4.108.0
 
 USER root