US home-sharing giant Airbnb has invested $75 million (Rs 516 crore) in India’s biggest hospitality firm Oyo, according to regulatory filings accessed by paper.vc. The funding round marks Airbnb’s first major investment in India’s burgeoning startup ecosystem. The investment also marks the end of Oyo’s series-E $1.1-billion round. Airbnb has invested $75 million (Rs 516 crore)…