docs(readme): updated readme to use checkout@v3

README.md

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: All things angular
       uses: AhsanAyaz/angular-deploy-gh-pages-actions@[version] ## replace by latest version without it you will see Expected format {org}/{repo}[/path]@ref. Actual 'AhsanAyaz/angular-deploy-gh-pages-actions',Input string was not in a correct format.
       with: