fix typos and other grammar issues
fix typos and other grammar issues

Signed-off-by: Kevin Broch <63f65e95fdb088c9d8090d5f224246ded386031f@rivosinc.com>

lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan,lowRISC/opentitan