bug #16098 Remove confusing character in class name (chapterjason)

This PR was merged into the 5.3 branch.

Discussion
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Remove confusing character in class name

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Commits
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9963782 Fix confusing character in class name

Author: OskarStark

form/bootstrap5.rst

@@ -114,7 +114,7 @@ Form type or ``ChoiceType`` configuration) to the label class.
         $builder
             ->add('myCheckbox', CheckboxType::class, [
                 'label_attr' => [
-                    'class' => '`checkbox-inline',
+                    'class' => 'checkbox-inline',
                 ],
             ])
             ->add('myRadio', RadioType::class, [