fix(gator-permissions-controller): remove merge conflict marker from CHANGELOG

[cryptodev-2s]

Explanation

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Low Risk
Documentation-only change to a changelog with no runtime or build impact.

Overview
Removes an accidentally committed merge-conflict marker in packages/gator-permissions-controller/CHANGELOG.md, restoring the @metamask/transaction-controller bump entry under Unreleased.

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