Fix aiohttp instrumentors' readmes#3902

xrmx merged 4 commits intoopen-telemetry:mainopen-telemetry/opentelemetry-python-contrib:mainfrom

tammy-baylis-swi:fix-aiohttp-readmestammy-baylis-swi/opentelemetry-python-contrib:fix-aiohttp-readmesCopy head branch name to clipboard