Add more @elastic folks to codeowners (#1313)
Add more @elastic folks to codeowners (#1313)

In answer to https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/1304#issuecomment-712529326
add two more codeowners for the Elastic exporter.
open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector-contrib