add links in example nb with tei/tgi references (#25821)
I have validated langchain interface with tei/tgi works as expected when
TEI and TGI running on Intel Gaudi2. Adding some references to notebooks
to help users find relevant info.
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Co-authored-by: Rita Brugarolas <rbrugaro@idc708053.jf.intel.com>
Co-authored-by: Chester Curme <chester.curme@gmail.com>
