docs: fix minor typo (huggingface#13289)

jaketae · web-flow · commit 180c6de6a696 · 2021-08-31T06:49:05.000-04:00
`at` should be `a1`
diff --git a/docs/source/parallelism.md b/docs/source/parallelism.md
@@ -58,7 +58,7 @@ a0 | b0 | c0
 a1 | b1 | c1
 a2 | b2 | c2
 ```
-Layer La has weights a0, at and a2.
+Layer La has weights a0, a1 and a2.
 
 If we have 3 GPUs, the Sharded DDP (= Zero-DP) splits the model onto 3 GPUs like so:
 
