Fix stream directive validation error message (#4044)

Fixes the error message created by the
DeferStreamDirectiveOnValidOperationsRule for the stream directive.

Author: Cito

src/validation/__tests__/DeferStreamDirectiveOnValidOperationsRule-test.ts

@@ -241,7 +241,7 @@ describe('Validate: Defer/Stream directive on valid operations', () => {
     `).toDeepEqual([
       {
         message:
-          'Stream directive not supported on subscription operations. Disable `@defer` by setting the `if` argument to `false`.',
+          'Stream directive not supported on subscription operations. Disable `@stream` by setting the `if` argument to `false`.',
         locations: [{ line: 4, column: 20 }],
       },
     ]);
@@ -259,7 +259,7 @@ describe('Validate: Defer/Stream directive on valid operations', () => {
     `).toDeepEqual([
       {
         message:
-          'Stream directive not supported on subscription operations. Disable `@defer` by setting the `if` argument to `false`.',
+          'Stream directive not supported on subscription operations. Disable `@stream` by setting the `if` argument to `false`.',
         locations: [{ line: 8, column: 18 }],
       },
     ]);
@@ -301,7 +301,7 @@ describe('Validate: Defer/Stream directive on valid operations', () => {
     `).toDeepEqual([
       {
         message:
-          'Stream directive not supported on subscription operations. Disable `@defer` by setting the `if` argument to `false`.',
+          'Stream directive not supported on subscription operations. Disable `@stream` by setting the `if` argument to `false`.',
         locations: [{ line: 15, column: 18 }],
       },
     ]);

src/validation/rules/DeferStreamDirectiveOnValidOperationsRule.ts

@@ -70,7 +70,7 @@ export function DeferStreamDirectiveOnValidOperationsRule(
           if (!ifArgumentCanBeFalse(node)) {
             context.reportError(
               new GraphQLError(
-                'Stream directive not supported on subscription operations. Disable `@defer` by setting the `if` argument to `false`.',
+                'Stream directive not supported on subscription operations. Disable `@stream` by setting the `if` argument to `false`.',
                 { nodes: node },
               ),
             );