[connect] Sync missing test cases

[thibault2705]

pull request

Sync the connect exercise by adding the following missing test cases:

This PR partially solves issue #2959

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This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

For more information, refer to the documentation. If you are unsure whether to add the message or not, please ping @exercism/maintainers-admin in a comment. Thank you!

[kahgoh]

There are Checkstyle errors. Could you please look into them?

[29](https://github.com/exercism/java/actions/runs/24846500338/job/72808756337?pr=3108#step:4:730)
Error: eckstyle] [ERROR] /home/runner/work/java/java/exercises/practice/connect/src/test/java/ConnectTest.java:166:17: 'array initialization' child has incorrect indentation level 16, expected level should be 12. [Indentation]

Error: eckstyle] [ERROR] /home/runner/work/java/java/exercises/practice/connect/src/test/java/ConnectTest.java:167:17: 'array initialization' child has incorrect indentation level 16, expected level should be 12. [Indentation]
Error: eckstyle] [ERROR] /home/runner/work/java/java/exercises/practice/connect/src/test/java/ConnectTest.java:168:17: 'array initialization' child has incorrect indentation level 16, expected level should be 12. [Indentation]
Error: eckstyle] [ERROR] /home/runner/work/java/java/exercises/practice/connect/src/test/java/ConnectTest.java:169:17: 'array initialization' child has incorrect indentation level 16, expected level should be 12. [Indentation]
Error: eckstyle] [ERROR] /home/runner/work/java/java/exercises/practice/connect/src/test/java/ConnectTest.java:188:17: 'array initialization' child has incorrect indentation level 16, expected level should be 12. [Indentation]
Error: eckstyle] [ERROR] /home/runner/work/java/java/exercises/practice/connect/src/test/java/ConnectTest.java:189:17: 'array initialization' child has incorrect indentation level 16, expected level should be 12. [Indentation]
Error: eckstyle] [ERROR] /home/runner/work/java/java/exercises/practice/connect/src/test/java/ConnectTest.java:190:17: 'array initialization' child has incorrect indentation level 16, expected level should be 12. [Indentation]
Error: eckstyle] [ERROR] /home/runner/work/java/java/exercises/practice/connect/src/test/java/ConnectTest.java:191:17: 'array initialization' child has incorrect indentation level 16, expected level should be 12. [Indentation]

[kahgoh]

Thanks for fixing the indenting!