OpenTelemetry span export to HTTPS fails

[palmm]

Version: Deno 2.1.5

% deno --version
deno 2.1.5 (stable, release, aarch64-apple-darwin)
v8 13.0.245.12-rusty
typescript 5.6.2

Deno fails to export spans to non-HTTP endpoints when the OpenTelemtry integration is enabled. Once the spans are ready to export, the following is logged to the console:

name="BatchSpanProcessor.Flush.ExportError" reason="Other(hyper_util::client::legacy::Error(Connect, \"invalid URL, scheme is not http\"))" message=Failed during the export process

Steps to reproduce:

1. Install deno 2.1.5.
2. Run OTEL_EXPORTER_OTLP_ENDPOINT=https://api.honeycomb.io OTEL_DENO=true deno run -N --unstable-otel https://gist.githubusercontent.com/palmm/5ea10d52ab7786601664d13051894c0c/raw/0465db0c9d98edbfd76bcebc40b5e2ccc6b24bff/main.ts
3. In a different terminal, run curl http://localhost:8000/ to trigger the span export. After a few seconds, the error message will be logged to the console running deno run.

keywords: otel opentelem opentelemetry