http: fixup options.method error message

Use `options.method` instead of just `method`

Signed-off-by: James M Snell <jasnell@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/32471


Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>