button border-radius added

[zalabhavy]

In the Navbar, the 'Get Started' button has sharp angles. Instead, we should make it rounded by adding a border radius.

Fixed #11622

Now Looks better with round shape 😊

Presubmit checklist

• This PR is marked as draft with an explanation if not meant to land until a future stable release.
• This PR doesn’t contain automatically generated corrections (Grammarly or similar).
• This PR follows the Google Developer Documentation Style Guidelines — for example, it doesn’t use i.e. or e.g., and it avoids I and we (first person).
• This PR uses semantic line breaks of 80 characters or fewer.

[google-cla]

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.

[zalabhavy]

@parlough @Sfshaza @antfitch Please check it and let me know if any changes are required.

A special thanks to @parlough for giving me the opportunity to try and solve my doubts and errors while running it on my local machine. Finally, everything is set, and I'm eager to contribute!

[parlough]

Thanks so much for sticking with this and making this improvement @zalabhavy!

However, as the [bot comment above says(https://github.com//pull/11664/checks?check_run_id=36552750354), you'll need to sign the Google CLA with your commit email before we can review and land the PR. If you have any issues doing so, let me know. Thanks again :)

[zalabhavy]

@parlough I have done rescan after CLA sign.

[zalabhavy]

@parlough Now CLA pass after some commits 😁

[parlough]

/gcbrun

[flutter-website-bot]

Visit the preview URL for this PR (updated for commit 48fbdb4):

https://flutter-docs-prod--pr11664-fixbtn-1hqj0iow.web.app

[parlough]

Thanks again for sticking with this @zalabhavy! Looks much better and also more consistent with the root flutter.dev :D