update descriptions

Author: lfolco

snippets/module/composer.json

@@ -23,6 +23,6 @@
        "\t}",
        "}"
   ],
-  "description": "Magento 2 composer file"
+  "description": "Magento 2 composer.json"
 }
 }

snippets/module/module.json

@@ -8,6 +8,6 @@
 			"\t<module name=\"${1:Vendor_Module}\" />",
 			"</config>"
 		],
-		"description": "Magento 2 DI scaffold"
+		"description": "Magento 2 module.xml"
 	}
 }

snippets/module/registration.json

@@ -8,6 +8,6 @@
 			"\t__DIR__",
 		");"
 		],
-		"description": "Magento 2 registration file"
+		"description": "Magento 2 registration.php"
 	}
 }