Make the reason argument in @deprecated non-nullable

martinbonnin · martinbonnin · commit b0dfb671306f · 2023-08-23T17:57:57.000+02:00
diff --git a/spec/Section 3 -- Type System.md b/spec/Section 3 -- Type System.md
@@ -2099,7 +2099,7 @@ condition is false.
 
 ```graphql
 directive @deprecated(
-  reason: String = "No longer supported"
+  reason: String! = "No longer supported"
 ) on FIELD_DEFINITION | ARGUMENT_DEFINITION | INPUT_FIELD_DEFINITION | ENUM_VALUE
 ```
 
