chore(CI): lint documentation heading case (#696)

Author: chenjiahan

package.json

@@ -7,8 +7,8 @@
     "change": "changeset",
     "changeset": "changeset",
     "check-dependency-version": "check-dependency-version-consistency .",
-    "check-spell": "pnpx cspell",
-    "format": "prettier . --write && biome check --write",
+    "check-spell": "pnpx cspell && heading-case",
+    "format": "prettier . --write && biome check --write && heading-case --write",
     "generate-release-pr": "zx scripts/generateReleasePr.mjs",
     "lint": "biome check . --diagnostic-level=warn && prettier . --check && pnpm run check-spell",
     "prebundle": "nx run-many -t prebundle",
@@ -49,6 +49,7 @@
     "cross-env": "^7.0.3",
     "cspell-ban-words": "^0.0.4",
     "fs-extra": "^11.3.0",
+    "heading-case": "^0.1.3",
     "nano-staged": "^0.8.0",
     "nx": "^20.3.1",
     "prettier": "^3.4.2",