Kenyan police fired volleys of tear gas Thursday in the heart of the capital Nairobi as small groups of protesters gathered on what was billed as a fresh day of action against embattled President William Ruto.Riot police patrolled the streets of the central business district, roadblocks were set up on major arteries and many shops were shut, but only a few dozen demonstrators turned out, chanting “we are peaceful”.The East African nation, one of the most stable in the region, has been rocked by weeks of sometimes deadly protests against Ruto’s two-year-old administration, mostly led by…