docs(user): drop emoji markers in troubleshooting code comments

[mesutoezdil]

docs/user/troubleshooting.md used emoji to mark wrong/correct examples. This repo's doc style forbids emoji. Replaced with plain WRONG / CORRECT text.

Tested: ran ./tools/ci/check-docs (0 errors).

Refs: NO-REF

[coderabbitai]

📝 Walkthrough

Walkthrough

The troubleshooting documentation clarifies the incorrect Docker credential encoding example by labeling API-key-only encoding, showing its output separately, and repositioning the correct encoding guidance.

Changes

Credential troubleshooting documentation

Layer / File(s)	Summary
Encoding example clarification docs/user/troubleshooting.md	The incorrect Base64 example is labeled and separated from the correct credential encoding instructions.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the doc-only change to replace emoji markers in troubleshooting code comments.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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