docs/integration: fix typo botchooser -> bootchooser
docs/integration: fix typo botchooser -> bootchooser

Signed-off-by: Michael Tretter <a36e900b77f8e7ece1b28cd37523d3dbb21a965a@pengutronix.de>

jluebbe/rauc,ejoerns/rauc,rauc/rauc,ejoerns/rauc,jluebbe/rauc,ejoerns/rauc,rauc/rauc,rauc/rauc,jluebbe/rauc