docs: add doc for unstable_unmockModule

Closes #15079

Author: BondarenkoAlex

docs/ECMAScriptModules.md

@@ -65,6 +65,79 @@ const {execSync} = await import('node:child_process');
 // etc.
 ```
 
+## Module unmocking in ESM
+
+```js title="esm-module.mjs"
+export default () => {
+  return 'default';
+};
+
+export const namedFn = () => {
+  return 'namedFn';
+};
+```
+
+```js title="esm-module.test.mjs"
+import {jest, test} from '@jest/globals';
+
+test('test esm-module', async () => {
+  jest.unstable_mockModule('./esm-module.js', () => ({
+    default: () => 'default implementation',
+    namedFn: () => 'namedFn implementation',
+  }));
+
+  const mockModule = await import('./esm-module.js');
+
+  console.log(mockModule.default()); // 'default implementation'
+  console.log(mockModule.namedFn()); // 'namedFn implementation'
+
+  jest.unstable_unmockModule('./esm-module.js');
+
+  const originalModule = await import('./esm-module.js');
+
+  console.log(originalModule.default()); // 'default'
+  console.log(originalModule.namedFn()); // 'namedFn'
+
+  /* !!! WARNING !!! Don`t override */
+  jest.unstable_mockModule('./esm-module.js', () => ({
+    default: () => 'default override implementation',
+    namedFn: () => 'namedFn override implementation',
+  }));
+
+  const mockModuleOverride = await import('./esm-module.js');
+
+  console.log(mockModuleOverride.default()); // 'default implementation'
+  console.log(mockModuleOverride.namedFn()); // 'namedFn implementation'
+});
+```
+
+You can override (that is new) implementation in the other test file
+
+```js title="esm-module.test.mjs"
+import {jest, test} from '@jest/globals';
+
+test('test esm-module new implementation', async () => {
+  jest.unstable_mockModule('./esm-module.js', () => ({
+    default: () => 'default new implementation',
+    namedFn: () => 'namedFn new implementation',
+  }));
+
+  const mockModule = await import('./esm-module.js');
+
+  console.log(mockModule.default()); // 'default new implementation'
+  console.log(mockModule.namedFn()); // 'namedFn new implementation'
+
+  jest.unstable_unmockModule('./esm-module.js');
+
+  const originalModule = await import('./esm-module.js');
+
+  console.log(originalModule.default()); // 'default'
+  console.log(originalModule.namedFn()); // 'namedFn'
+});
+```
+
+## Mocking CJS modules
+
 For mocking CJS modules, you should continue to use `jest.mock`. See the example below:
 
 ```js title="main.cjs"