docs: update v1 changelog

[vadyvas]

What/Why/How?

update v1 changelog

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Testing

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• This PR follows the contributing guide
• All new/updated code is covered by tests
• Core code changed? - Tested with other Redocly products (internal contributions only)
• New package installed? - Tested in different environments (browser/node)
• Documentation update has been considered

Security

• The security impact of the change has been considered
• Code follows company security practices and guidelines

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Note

Low Risk
Low risk: documentation-only update with no runtime or build behavior changes.

Overview
Updates the v1 CLI changelog (docs/@v1/changelog.md) by adding entries for versions 1.34.11–1.34.14, documenting dependency bumps (Handlebars, undici, @redocly/openapi-core, @redocly/respect-core) and push command stability/timeout improvements.

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[changeset-bot]

⚠️ No Changeset found

Latest commit: c646966

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

CLI Version	Mean Time ± Std Dev (s)	Relative Performance (Lower is Faster)
cli-latest	1.989s ± 0.021s	▓ 1.00x (Fastest)
cli-next	1.994s ± 0.031s	▓ 1.00x

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	80.08% (🎯 80%)	7130 / 8903
🔵	Statements	79.49% (🎯 79%)	7408 / 9319
🔵	Functions	83.47% (🎯 83%)	1430 / 1713
🔵	Branches	71.67% (🎯 71%)	4829 / 6737

File Coverage

No changed files found.

Generated in workflow #9721 for commit c646966 by the Vitest Coverage Report Action