📝 should -> must

index.html

@@ -40,7 +40,7 @@ <h2>Stages</h2>
 
 <p>Changes to the language are developed by way of a process which provides guidelines for evolving an addition from an idea to a fully specified feature, complete with acceptance tests and multiple implementations. There are six stages: a strawperson stage and five “maturity” stages. The committee must approve acceptance for each stage.
 
-<p>Proposals at stage 1 and beyond should be owned by the committee. Upon proposal acceptance, any externally-owned repositories should be transferred by following the <a href="https://github.com/tc39/proposals#onboarding-existing-proposals">onboarding instructions</a>.
+<p>Proposals at stage 1 and beyond must be owned by the committee. Upon proposal acceptance, any externally-owned repositories must be transferred by following the <a href="https://github.com/tc39/proposals#onboarding-proposals">onboarding instructions</a>.
 
 <table id="stages">
   <caption>ECMAScript Proposal Stages</caption>