Normative references to discontinued specs in Service Workers Nightly

[dontcallmedom-bot]

While crawling Service Workers Nightly, the following normative references were detected as pointing to discontinued specifications:

• RFC7230 has been obsoleted by rfc9110,rfc9112
• RFC7231 has been obsoleted by rfc9110

_{This issue was detected and reported semi-automatically by Strudy based on data collected in webref.}