Incorect detection of text/csv

[cupsadarius]

Attach the file for which the detection is inaccurate
You can use the file sharing site of your choice, just ensure the file will not expire or get deleted.

sample.csv
Expected MIME type
text/csv

Returned MIME type
text/plain; charset=utf-8;

Version of the library you are using
v1.4.3

Output of go version
go version go1.21.6 darwin/amd64

Additional context
Add any other context about the problem here.
with version v1.4.0 the mimetype was correctly detected as text/csv. Version 1.4.3 seems to break it even with mimetype.SetLimit(0)

Alternatively, you can fork the project, commit the file with a failing test and reference the commit in the issue.
25f95acfe333721df1302387b3d87b29299af274