fix: rename npm_package_json to npm_requirements

Author: aslafy-z

package.py

@@ -814,7 +814,7 @@ def commands_step(path, commands):
                     pip_requirements = claim.get("pip_requirements")
                     poetry_install = claim.get("poetry_install")
                     poetry_export_extra_args = claim.get("poetry_export_extra_args", [])
-                    npm_requirements = claim.get("npm_package_json")
+                    npm_requirements = claim.get("npm_requirements")
                     runtime = claim.get("runtime", query.runtime)
 
                     if pip_requirements and runtime.startswith("python"):