Bug Report: Update NPM - react-markdown Link in Section 3 Slides

[riteshgarg0605]

Description:
The NPM package link for react-markdown in Section 3: React State is outdated. Currently, it redirects to version 8.0.6. However, the course dependencies use version 9.0.1, which includes updated functionality and changes. This discrepancy causes confusion and leads to unnecessary time spent reconciling the differences.

Steps to Reproduce:

Navigate to Section 3: React State slides.
Click on the react-markdown NPM link (current link).
Observe the redirection to version 8.0.6 of the package documentation.
Expected Behavior:
The link should redirect to the latest version of the react-markdown documentation (v9.0.1) to ensure alignment with the course material and dependencies.

Proposed Fix:
Update the link in the slides to point to the latest version of the react-markdown package documentation.

Additional Context:
This update will improve the user experience by eliminating confusion and saving time for learners.