Update usage instructions

src/slidedeckai/global_config.py

@@ -226,9 +226,9 @@ class GlobalConfig:
         ' You do not need to upload the same file again to continue'
         ' the interaction and refining—the contents of the PDF file will be retained in the'
         ' same interactive session.'
-        '\n\nCurrently, paid or *free-to-use* LLMs from eight different providers are supported.'
+        '\n\nCurrently, paid or *free-to-use* LLMs from several providers are supported.'
         ' A [summary of the supported LLMs]('
-        'https://github.com/barun-saha/slide-deck-ai/blob/main/README.md#summary-of-the-llms)'
+        'https://github.com/barun-saha/slide-deck-ai?tab=readme-ov-file#unmatched-flexibility-choose-your-ai-brain)'
         ' is available for reference. SlideDeck AI does **NOT** store your API keys.'
         '\n\nSlideDeck AI does not have access to the Web, apart for searching for images relevant'
         ' to the slides. Photos are added probabilistically; transparency needs to be changed'