Consider treating "page experience" as a proper noun.

## Summary

Throughout the bentojs website, the term "page experience" comes up multiple times. While this may be a common term for those familiar with the [Google Search ranking signal](https://developers.google.com/search/docs/advanced/experience/page-experience), it may be worth it for us to treat it as a proper noun (capitalize) and to provide a canonical link. That way it doesn't seem like a "fluff" term and is seen as a highly specific value proposition.

Relatedly, in the section titled "Great page experience with Bento", I think it would be more clear to state "Great [Web Vitals](https://web.dev/vitals/)" instead since the corresponding image directly references vitals specifically.


Search the bentojs website for each occurrence of “page experience” and inspect the section titled “Great page experience with Bento.” Update the wording consistently, capitalize the proper noun, add the canonical Google link, and consider the proposed Web Vitals wording; done means the visible copy and links match the issue’s requested terminology.

Written by the indexing model from the issue text.