fix(oas31): allow override names of top level schemas (#9787)

Refs #9713

Co-authored-by: Oliwia Rogala <oliwia.rogala@smartbear.com>

test/e2e-cypress/e2e/features/plugins/json-schema-2020-12/schema-title.cy.js

@@ -0,0 +1,21 @@
+/**
+ * @prettier
+ */
+
+describe("JSON Schema 2020-12 title keyword", () => {
+  it("should render a correct title for schemas", () => {
+    cy.visit("/?url=/documents/features/json-schema-2020-12-title.yaml")
+      .get(".json-schema-2020-12__title")
+      .eq(0)
+      .contains("My Pet")
+      .should("exist")
+      .get(".json-schema-2020-12__title")
+      .eq(1)
+      .contains("My Pets")
+      .should("exist")
+      .get(".json-schema-2020-12__title")
+      .eq(2)
+      .contains("Error")
+      .should("exist")
+  })
+})