fix: typo "hierarchy", "should"

[PabloLION]

This only changes the typo of Hiearchy to Hierarchy and hiearchy to hierarchy
More typos: "shoud" -> "should"

Community PR Review Checklist

First Time Specifics

• if its your first pull request to Dendron, watch out for the CLA bot that will ask you to agree to Dendron's CLA
• if its your first pull request and you're on our Discord, make sure that Kevin gives you the horticulturalist role by adding your discord as part of the description 👨‍🌾👩‍🌾

Commit

• make sure your branch names adhere to our branch style

Code

• code should follow Code Conventions
• circular dependency check: make sure your code is not introducing new circular dependencies in plugin-core. See Avoiding Circular Dependencies.
• sticking to existing conventions instead of creating new ones
  • eg: if configuration for utilities are already in one module or package, add future utilities there as well

Tests

• Confirm existing tests pass
• Confirm manual testing

[PabloLION]

It seems that my "sort import" changed import orders.. should I change it back?

[CLAassistant]

All committers have signed the CLA.

[SeriousBug]

Thanks for the correction! I left a few messages.

[jonathanyeung]

lgtm, thanks!