Update README.md

README.md

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 weighted/imatrix quants of https://huggingface.co/meta-llama/Meta-Llama-3.1-405B-Instruct
 
-These imatrix quants have recently been requantized from a higher quality imatrix calculated
-from the source model instead of the Q8_0, in what was probably the largest distributed imatrix
-computation to date (and also one of the first).
+These imatrix quants have recently been requantized using a higher quality imatrix calculated
+directly from the source model (instead of the Q8_0 quant used for the previous imatrix). This was
+probably the largest distributed imatrix computation to date (and also one of the first).
 
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 static quants are available at https://huggingface.co/mradermacher/Meta-Llama-3.1-405B-Instruct-GGUF