Add YouTube link for GroundedSAM 2 tutorial

[noorkhokhar99]

Add YouTube link for GroundedSAM 2 tutorial

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Description:

This PR adds a link to a tutorial video demonstrating How to Auto Label Your Custom Dataset with Grounded SAM 2. The video provides a step-by-step guide on using GroundedSAM 2 for auto-annotation, making it easier for users to implement this tool in their projects.

Resources:

• Tutorial Video: [How to Auto Label Your Custom Dataset with Grounded SAM 2] https://www.youtube.com/watch?v=A6m0mwUQUQU&t=9s

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Type of Change:

• [x] This change requires a documentation update

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How Has This Change Been Tested?

• The YouTube link has been verified to be functional and accessible.
• The tutorial video has been reviewed to ensure it aligns with the documentation and provides value to users.

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Deployment Considerations:

• No deployment changes are required. This is a documentation update only.

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Docs:

• [x] Docs updated.
• Changes: Added a link to the tutorial video under the relevant section in the README.md file.

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Files Changed:

• README.md: Added the YouTube link for the GroundedSAM 2 tutorial.

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Preview of Changes:

## Tutorials and Resources
- [How to Auto Label Your Custom Dataset with Grounded SAM 2] https://www.youtube.com/watch?v=A6m0mwUQUQU&t=9s 
-  : A step-by-step guide on using GroundedSAM 2 for auto-annotation.

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