minor #11015 Update registration_form.rst (beamop)

This PR was submitted for the 4.2 branch but it was merged into the 3.4 branch instead (closes #11015).

Discussion
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Update registration_form.rst

Fixed minor errors.

Commits
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9687839 Fixed minor errors

Author: javiereguiluz

doctrine/registration_form.rst

@@ -440,13 +440,13 @@ To do this, add a ``termsAccepted`` field to your form, but set its
         public function buildForm(FormBuilderInterface $builder, array $options)
         {
             $builder
-                ->add('email', EmailType::class);
+                ->add('email', EmailType::class)
                 // ...
                 ->add('termsAccepted', CheckboxType::class, [
                     'mapped' => false,
                     'constraints' => new IsTrue(),
                 ])
-            );
+            ;
         }
     }