Fix Date component for string from remark

remark-modified-time.mjs

@@ -1,9 +1,9 @@
 import { execSync } from "child_process";
 
 export const remarkModifiedTime = () => {
-  return (tree, file) => {
+  return (file) => {
     const filepath = file.history[0];
     const result = execSync(`git log -1 --pretty="format:%cI" "${filepath}"`);
     file.data.astro.frontmatter.lastModified = result.toString();
   };
-};
+}