chore(changelogs): document broken Dojo bundle fix for 7 widgets

[r0b1n]

Summary

• Adds [Unreleased] changelog entry to 7 widgets whose released builds emitted broken JS bundles that failed to load in the Dojo client
• Root cause: the dependency update in chore: pwt update #2252 caused Babel helpers to be emitted as dangling top-level functions instead of inside the AMD define([...]) wrapper; fixed in chore: bump babel targets to prevent inclusion of helpers #2291
• Affected widgets: slider-web (3.0.3), range-slider-web (3.0.2), html-element-web (1.2.8 & 1.2.9), popup-menu-web (4.3.0), color-picker-web (2.1.7), document-viewer-web (1.2.1), signature-web (2.0.0)
• data-widgets already has the fix captured in its 3.11.2 release changelog

Test plan

• Verify [Unreleased] section is present and correct in all 7 widget CHANGELOGs
• No version bumps — those happen at release time, one widget at a time

[github-actions]

AI Code Review

✅ Approved — no issues found

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What was reviewed

File	Change
packages/pluggableWidgets/color-picker-web/CHANGELOG.md	Added [Unreleased] ### Fixed entry for broken Dojo bundle
packages/pluggableWidgets/document-viewer-web/CHANGELOG.md	Added [Unreleased] ### Fixed entry for broken Dojo bundle
packages/pluggableWidgets/html-element-web/CHANGELOG.md	Added [Unreleased] ### Fixed entry for broken Dojo bundle
packages/pluggableWidgets/popup-menu-web/CHANGELOG.md	Added [Unreleased] ### Fixed entry for broken Dojo bundle
packages/pluggableWidgets/range-slider-web/CHANGELOG.md	Added [Unreleased] ### Fixed entry for broken Dojo bundle
packages/pluggableWidgets/signature-web/CHANGELOG.md	Added [Unreleased] ### Fixed entry for broken Dojo bundle
packages/pluggableWidgets/slider-web/CHANGELOG.md	Added [Unreleased] ### Fixed entry for broken Dojo bundle

Skipped (out of scope): dist/, pnpm-lock.yaml

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Positives

• All 7 entries correctly use the [Unreleased] section — no premature version bumps, consistent with the repo convention that version bumps happen in a dedicated release PR.
• Entry wording is user-facing and behaviour-focused ("not loading in the Dojo client"), not an internal implementation detail — exactly what changelogs for users should contain per AGENTS.md.
• Identical, consistent wording across all 7 widgets makes the batch change easy to verify at a glance.
• PR title follows conventional commits format (chore(changelogs): …) and the body clearly documents root cause, fix PR reference, and affected versions — well-scoped and traceable.