use apt-cyg install software-package but always show certificate'problem?

[akingbrDu]

Installing pkg-config
pkg-config-2.0.0-1.tar.zst: FAILED
sha512sum: WARNING: 1 computed checksum did NOT match
--2023-08-10 05:07:12-- https://mirrors.163.com/cygwin//x86_64/release/pkgconf/pkg-config/pkg-config-2.0.0-1.tar.zst
Resolving mirrors.163.com... 101.71.33.11
Connecting to mirrors.163.com|101.71.33.11|:443... connected.
ERROR: cannot verify mirrors.163.com's certificate, issued by /C=US/O=Let\'s Encrypt/CN=R3': Unable to locally verify the issuer's authority. To connect to mirrors.163.com insecurely, use --no-check-certificate'.
pkg-config-2.0.0-1.tar.zst: FAILED
sha512sum: WARNING: 1 computed checksum did NOT match

in cygwin， how to fix it ,thanks a lot

[equalman]

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