pzstd file is not detected as zstd

[Koyorice]

Attach the file for which the detection is inaccurate
test.zip
test.txt.zst uses zstd
test2.txt.zst uses pzstd

Expected MIME type
application/zstd

Returned MIME type
application/octet-stream

Version of the library you are using
v1.4.7

Output of go version
go version go1.23.4 linux/amd64

Additional context
https://github.com/facebook/zstd
Files created using pzstd are not detection correctly, if use file command both will be detected as application/zstd

[gabriel-vasile]

Thank you!

[Koyorice]

Thank you too!