📝 docs: replace SVG badges with dynamic JSON badges in README.md

This commit resolves the broken links of the status badges in the
README.md file, which resulted from the issue mentioned in the Google
Sites support thread at <https://support.google.com/sites/thread/253003338>.

The solution involves using Shields.io dynamic JSON badges instead of
SVG badges. The new badges:

- Are hosted on Shields.io and do not depend on Google Drive
- Use a custom Google Apps Script web app to fetch the project status
- Have updated URLs and labels in the README.md file

The changes ensure that the badges show the correct status and work as
expected.

For more information on how to create and customize dynamic badges, see
<https://shields.io/badges/dynamic-json-badge>.

Fixs #95

README.md

@@ -2,8 +2,7 @@
 
 A Google Apps Script to automatically fetch the latest available IG Stories of a target Instagram user to your Google Drive.
 
-[![clasp](https://img.shields.io/badge/built%20with-clasp-4285f4.svg)](https://github.com/google/clasp) [![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square)](https://github.com/prettier/prettier) ![GitHub](https://img.shields.io/github/license/chriskyfung/AutoFetcher-IG-Stories-to-GDrive)
-![Service Status](https://drive.google.com/u/0/uc?id=1BCyF1y8m1LKj8Um77st-3KC5-sTESoUZ&export=download) ![Last Tested Date](https://drive.google.com/u/0/uc?id=1VnSH5wtVOJXd_kmZsCSd3yQSpXTjMr0E&export=download)
+[![clasp](https://img.shields.io/badge/built%20with-clasp-4285f4.svg)](https://github.com/google/clasp) [![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square)](https://github.com/prettier/prettier) ![GitHub](https://img.shields.io/github/license/chriskyfung/AutoFetcher-IG-Stories-to-GDrive) ![Health Status](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Fscript.google.com%2Fmacros%2Fs%2FAKfycbyLpLviO5VJY-AQGKWv5Mqy7jbJqGY3UfQqI56tWLbGIV9k0eI2mos0FgdOU9u2o164%2Fexec&query=%24.health&label=health%20check&color=%24.color) ![Last Tested Date](https://img.shields.io/badge/dynamic/json?url=https%3A%2F%2Fscript.google.com%2Fmacros%2Fs%2FAKfycbyLpLviO5VJY-AQGKWv5Mqy7jbJqGY3UfQqI56tWLbGIV9k0eI2mos0FgdOU9u2o164%2Fexec&query=%24.date&label=last%20tested&color=9146ff)
 
 ## 🔔 Highlights