doc: correct table end for metadata filter

Signed-off-by: Mulvya <mulvya@gmail.com>

doc/filters.texi

@@ -16400,13 +16400,13 @@ Float representation of @code{value} from metadata key.
 
 @item VALUE2
 Float representation of @code{value} as supplied by user in @code{value} option.
+@end table
 
 @item file
 If specified in @code{print} mode, output is written to the named file. Instead of
 plain filename any writable url can be specified. Filename ``-'' is a shorthand
 for standard output. If @code{file} option is not set, output is written to the log
 with AV_LOG_INFO loglevel.
-@end table
 
 @end table