[Bug Report] el-date-picker week bug
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- Dominant language
- Vue
- Stars
- 54k
- Forks
- 14.4k
- PR merge metrics
- No merged PRs in 30d
Description
### Element UI version
2.15.0
### OS/Browsers version
windows10/goole
### Vue version
2.6.12
### Reproduction Link
https://github.com/ElemeFE/element/blob/dev/FAQ.md#%E5%B8%B8%E8%A7%81%E9%97%AE%E9%A2%98
### Steps to reproduce
代码如下：
选择2020-12-27~2021-01-02
周期显示了53周
### What is Expected?
52周
### What is actually happening?
53周
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