fix(deps): update module go.opentelemetry.io/auto to v0.21.0#1842

MrAlias merged 2 commits intomainopen-telemetry/opentelemetry-go-instrumentation:mainfrom

renovate/go.opentelemetry.io-auto-0.xopen-telemetry/opentelemetry-go-instrumentation:renovate/go.opentelemetry.io-auto-0.xCopy head branch name to clipboard