fix: build-metadata reference in lerna schema

Author: JamesHenry

packages/lerna/schemas/lerna-schema.json

@@ -1738,7 +1738,7 @@
           "type": "boolean",
           "description": "During `lerna version`, when true, amend the existing commit instead of generating a new one."
         },
-        "build-metadata": {
+        "buildMetadata": {
           "describe": "Apply semver-compatible build metadata to the release",
           "requiresArg": true,
           "type": "string"