calcurse.1.txt: Update details on note file names
calcurse.1.txt: Update details on note file names

Since 5c6a00e (Use hash-bashed file names in edit_note(), 2011-08-02),
the file name of notes is no longer generated by mkstemp.

Signed-off-by: Lukas Fleischer <af90e31281d8305af43dc616c5aaca3c7165f8a7@cryptocrack.de>

lfos/calcurse,lfos/calcurse,lfos/calcurse