[README] Update the cmake option name for the WASI-NN.

Signed-off-by: YiYing He <yiying@secondstate.io>

Author: q82419

.github/workflows/build.yaml

@@ -44,7 +44,7 @@ jobs:
           ldconfig;\
           git clone https://github.com/WasmEdge/WasmEdge;\
           cd ./WasmEdge;\
-          cmake -Bbuild -GNinja -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE -DWASMEDGE_WASINN_BACKEND="OpenVINO" .;\
+          cmake -Bbuild -GNinja -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE -DWASMEDGE_PLUGIN_WASI_NN_BACKEND="OpenVINO" .;\
           cmake --build build;"
       - name: Build and run Rust example - Mobilenet
         run: |

README.md

@@ -64,10 +64,10 @@ git clone https://github.com/WasmEdge/WasmEdge.git
 cd WasmEdge
 ```
 
-And build with the `WASMEDGE_WASINN_BACKEND` argument:
+And build with the `WASMEDGE_PLUGIN_WASI_NN_BACKEND` argument:
 
 ```bash
-cmake -Bbuild -GNinja -DWASMEDGE_WASINN_BACKEND="OpenVINO" .
+cmake -Bbuild -GNinja -WASMEDGE_PLUGIN_WASI_NN_BACKEND="OpenVINO" .
 cmake --build build
 # For the WASI-NN plugin, you should install this project.
 cmake --install build