Add Pre-built Dataset Link to Semantic Search with FAISS Section (Chapter 5 , 6th module ) for Enhanced Learner Convenience

**Enhancement Proposal** : Section 5.6(Semantic Search with FAISS) of the NLP course requires a dataset from Section 5.5(Creating your own dataset), which involves creating it through GitHub issues. To help learners focus directly on learning semantic search with FAISS without dataset setup, I propose adding a link to a pre-built dataset at the beginning of Section 5.6.

Details:

**Dataset** : Prepared as described in Section 5.5, uploaded on my Hugging Face account.
**Accessibility** :Direct link at the start of Section 5.6 for immediate use.
**Benefit** : Enables learners to skip dataset creation, focusing solely on semantic search techniques.

Suggested Change: Add this line at the beginning of Section 5.6: "Start this section with a ready-to-use dataset available"
I have the dataset uploaded on my hugging face account , one can directly download or use it from there.

**Label Suggestion** : Please consider adding the labels enhancement (link/feature update)

[Dataset-link](https://huggingface.co/datasets/amannagrawall002/github-issues)
Using namespace - amannagrawall002/github-issues