fix typo contribution_id

public/api/contributions.php

@@ -632,7 +632,7 @@ function handle_create_comment($input) {
         $stmt2 = $pdo->prepare("
             UPDATE contributions
             SET comment_count = comment_count + 1 
-            WHERE id = :cid;
+            WHERE contribution_id = :cid;
         ");
 
         $stmt2->execute([':cid' => $input['contribution_id']]);