doc changes (#50)

docs/api/utils/sleep.md

@@ -22,6 +22,21 @@ sleep(milliseconds)
 await sleep(1000); // sleeps for 1 second
 ```
 
+```js
+// sleeps for 1 second after running a spec 
+await spec()
+  .get('/path')
+  .expectStatus(200)
+  .sleep(1000); 
+```
+
+```js
+// Using handler
+await spec('get users')
+    .expectStatus(200)
+    .sleep(1000);
+```
+
 ## Arguments
 
 #### > milliseconds (number)
@@ -37,6 +52,32 @@ const { sleep } = require('pactum');
 await sleep(100);
 ```
 
+## Using Spec
+
+```js
+const { spec } = require('pactum');
+
+await spec()
+  .get('https://reqres.in/api/path')
+  .expectStatus(200)
+  .sleep(1000); 
+```
+
+## Using Handler
+
+```js
+const { spec , handler} = require('pactum');
+
+handler.addSpecHandler('get users', (ctx) => {
+  const { spec } = ctx;
+  spec.get('https://reqres.in/api/users');
+});
+
+await spec('get users')
+    .expectStatus(200)
+    .sleep(1000); 
+```
+
 ## Yields
 
 Returns a promise that resolves after a given number of milliseconds.