Card: sha256 up to ckpt_6750.pt

README.md

@@ -46,6 +46,7 @@ and checked against these sums. The list is extended as the run progresses.
 833e1c9baec710e8aab43be0f8623467d66d1498da25764c9fd5f94b118c194c  ckpt_6300.pt
 065458042ee08ea4c3154256d4405fce33aa4511a48265a11eed6494ed2c849b  ckpt_6450.pt
 0c290af8dc9892d48d795219b120ab83c4e4e5294338494ab668dc11125410b3  ckpt_6600.pt
+970518a13efa13f65bfb6bc17db16b6b9daa010d7bfc615a799d07284d6fa38e  ckpt_6750.pt
 ```
 
 ## License