Update basil/firmware/modules/timestamp/README.rst
Update basil/firmware/modules/timestamp/README.rst

Co-authored-by: Tomasz Hemperek <24766c0ce83d4bede97888625a8c475bb1e96d95@users.noreply.github.com>
SiLab-Bonn/basil,SiLab-Bonn/basil