fix: add marker after all updates

Author: Ma11hewThomas

dist/index.js

@@ -115,10 +115,6 @@ async function handleComment(
   }
 ): Promise<void> {
   let finalBody = body
-  if (!finalBody.includes(marker)) {
-    finalBody = `${finalBody}\n${marker}`
-  }
-
   const existingComment = await findExistingMarkedComment(
     owner,
     repo,
@@ -134,6 +130,10 @@ async function handleComment(
     }
   }
 
+  if (!finalBody.includes(marker)) {
+    finalBody = `${finalBody}\n${marker}`
+  }
+
   if (
     existingComment &&
     (updateConfig.shouldUpdate || updateConfig.shouldOverwrite)