Use tabs for entity_mapping.neon example

Author: mglaman

README.md

@@ -186,11 +186,11 @@ For example, the Paragraphs module could have the following `entity_mapping.neon
 
 ```neon
 parameters:
-  entityMapping:
-    paragraph:
-      class: Drupal\paragraphs\Entity\Paragraph
-    paragraphs_type:
-      class: Drupal\paragraphs\Entity\ParagraphsType
+	entityMapping:
+		paragraph:
+			class: Drupal\paragraphs\Entity\Paragraph
+		paragraphs_type:
+			class: Drupal\paragraphs\Entity\ParagraphsType
 ```
 
 Then in the `composer.json` for Paragraphs, the `entity_mapping.neon` would be provided as a PHPStan include