Fix minimum required Go version

go.mod

go.sum

vendor/git.autistici.org/ai3/go-common/go.mod

vendor/git.autistici.org/ai3/go-common/go.sum

vendor/git.autistici.org/ai3/tools/replds/go.mod

vendor/git.autistici.org/ai3/tools/replds/go.sum

vendor/github.com/NYTimes/gziphandler/go.mod

vendor/github.com/NYTimes/gziphandler/go.sum

vendor/github.com/cenkalti/backoff/v4/go.mod

vendor/github.com/cespare/xxhash/v2/go.mod

vendor/github.com/cespare/xxhash/v2/go.sum

vendor/github.com/felixge/httpsnoop/go.mod

vendor/github.com/go-logr/logr/go.mod

vendor/github.com/go-logr/stdr/go.mod

vendor/github.com/go-logr/stdr/go.sum

vendor/github.com/miekg/dns/go.mod

vendor/github.com/miekg/dns/go.sum

vendor/github.com/prometheus/procfs/go.mod

vendor/github.com/prometheus/procfs/go.sum

...metry.io/contrib/instrumentation/net/http/otelhttp/go.mod