fix: changelog header

Author: moltar

src/index.ts

@@ -18,10 +18,10 @@ const plugins: Plugin[] = [
     '@semantic-release/changelog',
     {
       changelogTitle: `
-          # Changelog
+# Changelog
 
-          All notable changes to this project will be documented in this file.
-          See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
+All notable changes to this project will be documented in this file.
+See [Conventional Commits](https://conventionalcommits.org) for commit guidelines.
         `.trim(),
     },
   ],