missing jupyter when import JupyterCodeExecutor

[jamesliu]

Why are these changes needed?

It cannot correctly import JupyterCodeExecutor, JupyterConnectionInfo

Checks

• [V] I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• [V] I've added tests (if relevant) corresponding to the changes introduced in this PR.
• [V] I've made sure all auto checks have passed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37.06%. Comparing base (3dfa305) to head (30cee02).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2132   +/-   ##
=======================================
  Coverage   37.06%   37.06%           
=======================================
  Files          68       68           
  Lines        7069     7069           
  Branches     1543     1543           
=======================================
  Hits         2620     2620           
  Misses       4218     4218           
  Partials      231      231           

Flag	Coverage Δ
unittests	37.04% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.