docs: links to empty playgrounds

Author: satanTime

README.md

@@ -34,8 +34,8 @@ The current version of the library **has been tested** and **can be used** with:
 - [GitHub repo](https://github.com/ike18t/ng-mocks)
 - [NPM package](https://www.npmjs.com/package/ng-mocks)
 
-* Live [example on StackBlitz](https://stackblitz.com/github/ng-mocks/examples/tree/tests?file=src/test.spec.ts)
-* Live [example on CodeSandbox](https://codesandbox.io/s/github/ng-mocks/examples/tree/tests?file=/src/test.spec.ts)
+* Live [example on StackBlitz](https://stackblitz.com/github/ng-mocks/examples?file=src/test.spec.ts)
+* Live [example on CodeSandbox](https://codesandbox.io/s/github/ng-mocks/examples?file=/src/test.spec.ts)
 
 - [chat on gitter](https://gitter.im/ng-mocks/community)
 - **[ask a question on Stackoverflow](https://stackoverflow.com/questions/ask?tags=ng-mocks%20angular%20testing%20mocking)**

docs/docusaurus.config.js

@@ -28,12 +28,12 @@ module.exports = {
         },
         {
           label: 'Try on StackBlitz',
-          href: 'https://stackblitz.com/github/ng-mocks/examples/tree/tests?file=src/test.spec.ts',
+          href: 'https://stackblitz.com/github/ng-mocks/examples?file=src/test.spec.ts',
           position: 'left',
         },
         {
           label: 'Try on CodeSandbox',
-          href: 'https://codesandbox.io/s/github/ng-mocks/examples/tree/tests?file=/src/test.spec.ts',
+          href: 'https://codesandbox.io/s/github/ng-mocks/examples?file=/src/test.spec.ts',
           position: 'left',
         },
         {
@@ -68,11 +68,11 @@ module.exports = {
             },
             {
               label: 'Try on StackBlitz',
-              href: 'https://stackblitz.com/github/ng-mocks/examples/tree/tests?file=src/test.spec.ts',
+              href: 'https://stackblitz.com/github/ng-mocks/examples?file=src/test.spec.ts',
             },
             {
               label: 'Try on CodeSandbox',
-              href: 'https://codesandbox.io/s/github/ng-mocks/examples/tree/tests?file=/src/test.spec.ts',
+              href: 'https://codesandbox.io/s/github/ng-mocks/examples?file=/src/test.spec.ts',
             },
             {
               label: 'Execute tests on CI',