Add git pull before you push (#2)

* Add  git pull before you push

* Update README.md

Co-authored-by: Kevin Heis <heiskr@users.noreply.github.com>

* Update README.md

Co-authored-by: Kevin Heis <heiskr@users.noreply.github.com>

* Update README.md

Co-authored-by: Kevin Heis <heiskr@users.noreply.github.com>

Co-authored-by: Kevin Heis <heiskr@users.noreply.github.com>

Author: anujdeshpande

README.md

@@ -159,6 +159,7 @@ We will start with using the parameters that are **required** and later implemen
    ```shell
    git add action.yml
    git commit -m 'create action.yml'
+   git pull
    git push
    ```
 5. Wait about 20 seconds then refresh this page for the next step.
@@ -216,6 +217,7 @@ Our action does not require much metadata for it to run correctly. We will not b
    ```shell
    git add action.yml
    git commit -m 'add metadata for the joke action'
+   git pull
    git push
    ```
 4. Wait about 20 seconds then refresh this page for the next step.
@@ -379,6 +381,7 @@ _Don't forget to call the `run()` function._
    ```shell
    git add joke.js main.js
    git commit -m 'creating joke.js and main.js'
+   git pull
    git push
    ```