docs: correct spelling of CHANGELOG

[coding-parrot]

Change "demonstarte" to "demonstrate".

Description

I am integrating the Google calendar with my app, and noticed this. No dependencies that are required for this change.

Fixes # (issue)

Is it been tested?

• It's a comment change.

Checklist

• [x] My code follows the style guidelines of this project - Yes.
• [x] I have performed a self-review of my own code - Yes.
• [x] I have performed a peer-reviewed with team member(s) - Not applicable.
• [x] I have commented my code, particularly in hard-to-understand areas - Not applicable.
• [x] I have made corresponding changes to the documentation - Not applicable.
• [x] My changes generate no new warnings - Yes.
• [x] Any dependent changes have been merged and published in downstream modules - Yes.

[google-cla[bot]]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[conventional-commit-lint-gcf[bot]]

🤖 I detect that the PR title and the commit message differ and there's only one commit. To use the PR title for the commit history, you can use Github's automerge feature with squashing, or use automerge label. Good luck human!

-- conventional-commit-lint bot https://conventionalcommits.org/