fix(skill-development): use imperative form in workflow reference (#45)

## Summary

- Fix second-person usage in `references/skill-creation-workflow.md`
- Change "the directories you actually need" → "the directories actually
needed"
- Ensures the skill follows its own writing style guidelines (imperative
form, not second person)

## Test plan

- [ ] Verify markdown renders correctly
- [ ] Confirm no other second-person violations remain in the file

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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: sjnims

plugins/plugin-dev/skills/skill-development/references/skill-creation-workflow.md

@@ -70,7 +70,7 @@ When editing the (newly-created or existing) skill, remember that the skill is b
 
 To begin implementation, start with the reusable resources identified above: `scripts/`, `references/`, and `assets/` files. Note that this step may require user input. For example, when implementing a `brand-guidelines` skill, the user may need to provide brand assets or templates to store in `assets/`, or documentation to store in `references/`.
 
-Also, delete any example files and directories not needed for the skill. Create only the directories you actually need (references/, examples/, scripts/).
+Also, delete any example files and directories not needed for the skill. Create only the directories actually needed (references/, examples/, scripts/).
 
 ### Update SKILL.md