Update no-nested-pipe.md

rule usage standalone code for playground

Author: birenrao

docs/rules/no-nested-pipe.md

@@ -7,30 +7,50 @@ This rule effects failures if `pipe` is called within a `pipe` handler.
 Examples of **incorrect** code for this rule:
 
 ```ts
-import { of, timer } from "rxjs";
-
-of("searchText1", "searchText2").pipe(switchMap((searchText) => {
-	return this.callSearchAPI(searchText).pipe(map(response => {
-               ......
-               ......
-// considering more lines here
-	})
-})
+import { switchMap, map, of } from 'rxjs';
+
+of('searchText1', 'searchText2')
+  .pipe(
+    switchMap(searchText => {
+      return callSearchAPI(searchText).pipe(
+        map(response => {
+          console.log(response);
+          return 'final ' + response;
+          // considering more lines here
+        })
+      );
+    })
+  )
+  .subscribe(value => console.log(value));
+
+function callSearchAPI(searchText) {
+  return of('new' + searchText);
+}
+
+
 ```
 
 Examples of **correct** code for this rule:
 
 ```ts
-import { of, timer } from "rxjs";
-import { mapTo, mergeMap } from "rxjs/operators";
-
-of("searchText1", "searchText2").pipe(switchMap((searchText) => this.getDisplayResponse(searchText)))
- 
-function getDisplayResponse (){
-this.callSearchAPI(searchText).pipe(map(response => {
-               ......
-               ......
- // considering more lines here
+import { switchMap, map, of } from 'rxjs';
+
+of('searchText1', 'searchText2')
+  .pipe(
+    switchMap(searchText => {
+      return callSearchAPI(searchText);
+    })
+  )
+  .subscribe(value => console.log(value));
+
+function callSearchAPI(searchText) {
+  return of('new' + searchText).pipe(
+    map(response => {
+      console.log(response);
+      return 'final ' + response;
+      // considering more lines here
+    })
+  );
 }
 
 ```