Update requirements.txt

requirements.txt

@@ -1,10 +1,11 @@
 streamlit
 pymupdf  # For PDF text extraction
 python-docx  # For DOCX text extraction
-nltk  # For text processing
-spacy  # For NLP tasks like Named Entity Recognition (NER)
-networkx  # For Mind Map graph visualization
-matplotlib  # For rendering the Mind Map
-transformers  # For Hugging Face NLP pipelines
-torch  # For model execution
+nltk  # For sentence tokenization
+spacy  # For NLP tasks like NER
+transformers  # For summarization & question answering
+torch  # Required for transformers models
+networkx  # For graph-based Mind Map
+matplotlib  # For visualizing Mind Map
+