[chores] fix typos in changelog

[sbouchet]

What does this PR do?

What issues does this PR fix?

How to test this PR?

Does this PR contain changes that override default upstream Code-OSS behavior?

• the PR contains changes in the code folder (you can skip it if your changes are placed in a che extension )
• the corresponding items were added to the CHANGELOG.md file
• rules for automatic git rebase were added to the .rebase folder

Summary by CodeRabbit

• Documentation
  • Updated the changelog entry format for a recent release note, improving readability with clearer section separation.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: a23c2462-e424-42f4-8f91-8c6e7e022399

📥 Commits

Reviewing files that changed from the base of the PR and between 6f42535 and 2e09801.

📒 Files selected for processing (1)

• .rebase/CHANGELOG.md

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📝 Walkthrough

Walkthrough

.rebase/CHANGELOG.md was updated in the @sbouchet entry for pull request #711 to add a blank line and a trailing --- separator after the listed files.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title is concise, imperative, and clearly relates to the changelog cleanup in this change.
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.
Rebase Rules For Upstream Changes	✅ Passed	Diff vs origin/main touches only .rebase/CHANGELOG.md; no files under code/ changed, so no rebase rules or routing updates were required.

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Pull Request images published ✨

Editor amd64: quay.io/che-incubator-pull-requests/che-code:pr-734-amd64
Editor arm64: quay.io/che-incubator-pull-requests/che-code:pr-734-arm64
Dev image: quay.io/che-incubator-pull-requests/che-code-dev:pr-734-dev-amd64

[rgrunber]

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Pull Request images published ✨

Editor amd64: quay.io/che-incubator-pull-requests/che-code:pr-734-amd64
Editor arm64: quay.io/che-incubator-pull-requests/che-code:pr-734-arm64
Dev image: quay.io/che-incubator-pull-requests/che-code-dev:pr-734-dev-amd64

[sbouchet]

@RomanNikitenko @rgrunber : due to

che-code/.github/workflows/smoke-test-pr-check.yaml

Line 19 in 6f42535

- '**/*.md'

, the smoke test won't trigger. BUT the smoke test is required on the settings. Soi this one is stuck.
two options : remove the required smoke test or i make a dummy change in another place to trigger the smoke test