Correction to comment wording in tableam.c

Hi Hackers,

I found an issue in the comments of the tableam.c file.

In the comment that currently reads:
Note that most function in here are documented in tableam.h

I believe the wording is incorrect. The phrase "most function" is
used, but based on the actual context, it is intended to refer to
"most functions", not a single specific function.

Therefore, this sentence should be corrected to:
Note that most functions in here are documented in tableam.h

This change better reflects the intended meaning and improves the
accuracy of the comment.

Regards,
shiyu qin