Deprecation warning about `memcpy` with newest `bytestring`

[andreasabel]

Shipping a fix for this warning would require a new release.

src/Crypto/Hash/SHA1.hs:133:19: warning: [GHC-68441] [-Wdeprecations]
    In the use of ‘memcpy’
    (imported from Data.ByteString.Internal, but defined in Data.ByteString.Internal.Type):
    Deprecated: "Use Foreign.Marshal.Utils.copyBytes instead"
    |
133 | copyCtx dst src = memcpy (castPtr dst) (castPtr src) (fromIntegral sizeCtx)
    |                   ^^^^^^