Add uptime badge to README

[sweep-nightly]

Description

This PR adds an uptime badge to the README file of the repository. The badge displays the current status of the application's uptime.

Summary of Changes

• Modified the README.md file to include the HTML code for the uptime badge at the top of the file.
• Added the following HTML code for the badge:

<a href="https://uptime.betterstack.com/?utm_source=status_badge"><img src="https://uptime.betterstack.com/status-badges/v1/monitor/v3bu.svg" alt="Better Stack Badge"></a>

Please review and merge this PR. Thank you!

Fixes #1941.

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Name	Status	Preview	Comments	Updated (UTC)
sweep-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Sep 30, 2023 1:01am