Add name to Naming Explanation page (#2199)

* Update bundles-and-vecs.md

* Update docs/src/explanations/bundles-and-vecs.md

Co-authored-by: Megan Wachs <megan@sifive.com>

* Update naming.md

Added a title to the cookbook

* Add name to Multiple Clock Domain page

* Update multi-clock.md

Co-authored-by: Megan Wachs <megan@sifive.com>