fix: XDate uses wrong format for formatting date in 12 h format in timeline EventBlock.js

[luckykenlin]

This PR addresses an issue with the 12-hour format display on the timeline event component. Previously, the component did not correctly format the time when using a 12-hour clock, which caused confusion for users relying on AM/PM distinctions.

Screenshots:

XDate docs

[luckykenlin]

any one review this?

[stale[bot]]

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