The W format in the FormatString method does not conform to the ISO-8601 standard, and there is no automatic zero padding

[zxdstyle]

Hello,

I encountered an issue with the following code:

carbon.Parse("2023-01-04 13:14:15").Format("YW")

golang version:1.18

carbon version: 2.1.9

I expected to get:

202301

But I actually get:

20231

Thanks!

[peleus]

Fixed in v1.7.3 and v2.2.3