#457 Minor typo in 3.99.5 manpage

[Mitchell Roe]

Minor patch to fix a typo in the manpage for 3.99.5.

$ diff lame.1 lame.1.new > lame.1.diff
264c264
< This tag in embedded in frame 0 of the MP3 file.
---
> This tag is embedded in frame 0 of the MP3 file.

[Robert Hegemann]

Thanks!