FIX codegen, again

crates/teloxide-core/src/codegen.rs

@@ -78,12 +78,14 @@ pub fn ensure_files_contents<'a>(
     let mut err_count = 0;
 
     for (path, contents) in files_and_contents {
+        if path.exists() {
             let old_contents = fs::read_to_string(path).unwrap();
     
             if normalize_newlines(&old_contents) == normalize_newlines(contents) {
                 // File is already up to date.
                 continue;
             }
+        }
 
         err_count += 1;