This question identified a grammatically incorrect phrase in the What does it mean when an answer is "accepted"? help center page. (Note: This particular page appears to be used across the stackexchange network. The problem is endemic.)
From what I can see, there's no edit button that lets one propose a change to a Help Center page. In fact, from what I can see, there's no feedback mechanism, period. My question isn't about that particular page. It's more generic:
Is there a mechanism by which mere mortals can suggest improvements to Help Center pages?