Update index.md

[SMNIK]

OC

[github-learning-lab]

It looks like you changed your theme, but for this activity we want to use minima.

⌨️ Activity: Change the theme to minima

Let's change the theme to minima:

1. At the top of this Pull Request, click the Files changed tab.
2. Click the icon to enter edit mode and change the theme: to minima.
3. Scroll to the bottom of the window to create a commit.
4. Enter a commit message then click Commit changes.

Don't worry, if you don't like this theme you can always change it later.

If you would like assistance troubleshooting the issue you are encountering, create a post on the GitHub Community board. You might also want to search for your issue to see if other people have resolved it in the past.

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Watch below for my next comment.