Update WeekTimeline.vue

[Kanbuduo]

fix: When { locale: ‘zh-CN’ }, the weekly mode is displayed abnormally

Checklist

Please put "X" in the below checkboxes that apply::

• If committing a bugfix, I have tested it in different browsers (Chrome, Firefox, Safari).
• If committing a new feature, I have first submitted an issue (Please note: you are free to open PRs for non-issued features, but opening an issue increases your chance of a successful PR).
• If committing a new feature, I have also written an appropriate test suite for it.

I have tested the following:

• Qalendar component in month mode.
• Qalendar component in week mode.
• Qalendar component in day mode.
• All of the above modes on emulated mobile view.
• Dragging and dropping events.
• Resizing events in day/week modes.
• Clicking events to open event dialog.

This PR solves the following problem**.

insert your description.

How to test this PR**.

For example:

1. Feed X and Y in the events-Prop.
2. Click Z or A.
3. Confirm that B is displayed.

[tomosterlund]

Thanks a lot for adding this. I hadn't noticed that the day names are completely off in Chinese! I appreciate your contribution.

Here a couple of suggestions for improving semantic clarity.

Also this will need unit tests (in WeekTimeline.test.ts). Do you want to add them yourself? If not, I can also do it.

[tomosterlund]

Suggested change

	getWeekTimeStr(day: dayInterface) {
	getDayName(day: dayInterface) {

[tomosterlund]

Suggested change

	const isCN = this.config?.locale?.toLowerCase() === 'zh-cn';
	const isChinese = this.config?.locale?.toLowerCase() === 'zh-cn';

[coveralls]

coverage: 96.773% (-0.01%) from 96.783% when pulling 49ba980 on Kanbuduo:patch-1 into 873e4c2 on tomosterlund:master.