update requirements with specific versions

requirements.txt

@@ -1,16 +1,16 @@
-openai
-langchain
-beautifulsoup4
-chromadb
-tiktoken
-pypdf
-gradio
-PyMuPDF
-gdown
-docx2txt
-sentence-transformers
-ibm-watson-machine-learning
-ibm-generative-ai
-html5lib
-lxml
+openai==1.3.3
+langchain==0.0.339
+beautifulsoup4==4.12.2
+chromadb==0.4.17
+tiktoken==0.5.1
+pypdf==3.17.1
+gradio==4.5.0
+PyMuPDF==1.23.6
+gdown==4.7.3
+docx2txt==0.8
+sentence-transformers==2.2.2
+ibm-watson-machine-learning==1.0.330
+ibm-generative-ai==0.5.1
+html5lib==1.1
+lxml==4.9.3
 unstructured[all-docs]