Fixed bayes_is_balanced function

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -33,6 +33,7 @@ body:
       label: Version
       description: What version of our software are you running?
       options:
+        - v0.4.x
         - v0.3.x
         - v0.2.x or lower
     validations:

crates/smtp/src/scripts/plugins/bayes.rs

@@ -260,7 +260,7 @@ pub fn exec_is_balanced(ctx: PluginContext<'_>) -> Variable {
             );
             return Variable::default();
         };
-    let learn_spam = ctx.arguments[2].to_bool();
+    let learn_spam = ctx.arguments[1].to_bool();
 
     // Obtain training counts
     let handle = ctx.handle;