minor #18316 [Serializer] Fix data type according to the field name on serializer.rst (brunoocasali)

This PR was submitted for the 6.2 branch but it was squashed and merged into the 5.4 branch instead.

Discussion
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[Serializer] Fix data type according to the field name on serializer.rst

Fix a typo because I assume the wanted type is a text, not an integer.

Commits
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64cb701 [Serializer] Fix data type according to the field name on serializer.rst

Author: javiereguiluz

serializer.rst

@@ -312,7 +312,7 @@ to your class::
         private $name;
 
         /**
-         * @ORM\Column(type="integer")
+         * @ORM\Column(type="text")
          * @Groups({"show_product"})
          */
         private $description;