Update README.md

README.md

@@ -50,6 +50,7 @@ The *conventional* T5 architectures are summarized in the following table:
 
 with the following definitions:
 
+| ----| ---- |
 | NL | Number of transformer blocks (depth) | 
 | EL | Number of transformer blocks in the encoder (encoder depth) | 
 | DL | Number of transformer blocks in the decoder (decoder depth) |