chore: format skill headings

Author: SoonIter

.prettierignore

@@ -3,6 +3,7 @@ dist
 compiled
 doc_build
 pnpm-lock.yaml
+skills-lock.yaml
 
 # Avoid syntax error
 e2e/cases/plugin-less/inline-js/src/*.less

dev-skills/docs-en-improvement/SKILL.md

@@ -3,7 +3,7 @@ name: docs-en-improvement
 description: Improve English documentation under `website/docs/en` by rewriting unnatural translated sentences into clear, professional English while preserving meaning. Use when editing or polishing English docs.
 ---
 
-# Docs En Improvement
+# Docs en improvement
 
 ## Steps
 

dev-skills/release-core/SKILL.md

@@ -3,7 +3,7 @@ name: release-core
 description: Use when asked to release `@rsbuild/core` for a specific version.
 ---
 
-# Release Core
+# Release core
 
 ## Input
 

dev-skills/sync-zh-en-docs/SKILL.md

@@ -3,7 +3,7 @@ name: sync-zh-en-docs
 description: Sync uncommitted docs between `website/docs/zh` and `website/docs/en`. Use when authors update docs in one language and need to align the mirrored `.md`/`.mdx` file in the other language.
 ---
 
-# Sync Zh/En Documentation
+# Sync Zh/En documentation
 
 ## Steps
 

dev-skills/write-e2e-cases/SKILL.md

@@ -3,7 +3,7 @@ name: write-e2e-cases
 description: Use when adding or updating Rsbuild end-to-end tests in `e2e/cases`, including new feature coverage, bug reproduction, and regression prevention.
 ---
 
-# Write E2E Cases
+# Write E2E cases
 
 ## Steps
 
@@ -19,7 +19,7 @@ description: Use when adding or updating Rsbuild end-to-end tests in `e2e/cases`
 
 6. Run `pnpm e2e` to validate.
 
-## Case Structure
+## Case structure
 
 - Include a `src` directory in every case (required).
 - Add `rsbuild.config.ts` only when needed.