docs: fix formating in README (#56)

change `Specify Multiple Model Instances`'s example format from `json` to `pbtxt`

Signed-off-by: Thytu <[email protected]>

Signed-off-by: Thytu <[email protected]>

Author: Thytu

README.md

@@ -216,7 +216,7 @@ Multiple model instances on same GPUs will share the weights, so there will not
 
 Set `count` here to start multiple model instances. Note `KIND_CPU` is the only choice here as the backend needs to take full control of how to distribute multiple model instances to all the visible GPUs.
 
-```json
+```pbtxt
 instance_group [
   {
     count: 8
@@ -278,4 +278,4 @@ Sep 2021
 
 Apr 2021
 - **Release the FasterTransformer backend 1.0**.
-  - Support Multi-GPU on GPT.
+  - Support Multi-GPU on GPT.