chore(docs): correct generated mock example

Author: SimenB

docs/JestObjectAPI.md

@@ -157,12 +157,12 @@ module.exports = {
     const result = await a * b;
     return result;
   },
-  class: new class Bar {
+  class: new (class Bar {
     constructor() {
       this.array = [1, 2, 3];
     }
     foo() {}
-  },
+  })(),
   object: {
     baz: 'foo',
     bar: {

website/versioned_docs/version-25.x/JestObjectAPI.md

@@ -153,12 +153,12 @@ module.exports = {
     const result = await a * b;
     return result;
   },
-  class: new class Bar {
+  class: new (class Bar {
     constructor() {
       this.array = [1, 2, 3];
     }
     foo() {}
-  },
+  })(),
   object: {
     baz: 'foo',
     bar: {

website/versioned_docs/version-26.x/JestObjectAPI.md

@@ -157,12 +157,12 @@ module.exports = {
     const result = await a * b;
     return result;
   },
-  class: new class Bar {
+  class: new (class Bar {
     constructor() {
       this.array = [1, 2, 3];
     }
     foo() {}
-  },
+  })(),
   object: {
     baz: 'foo',
     bar: {

website/versioned_docs/version-27.0/JestObjectAPI.md

@@ -157,12 +157,12 @@ module.exports = {
     const result = await a * b;
     return result;
   },
-  class: new class Bar {
+  class: new (class Bar {
     constructor() {
       this.array = [1, 2, 3];
     }
     foo() {}
-  },
+  })(),
   object: {
     baz: 'foo',
     bar: {