post: check if file exists before unlinking

post.js

@@ -2,9 +2,11 @@ const core = require('@actions/core')
 const fs = require('fs')
 
 function rm(file) {
+    if (fs.existsSync(file)) {
         core.info(`==> Deleting "${file}" file`)
         fs.unlinkSync(file)
     }
+}
 
 async function main() {
     try {