Updated build commands to align with wasip1 changes

Author: gonzolively

docs/quickstart/first-app/first-container/index.md

@@ -30,7 +30,7 @@ Let's build your first Ocre container using the "*hello-world*" sample applicati
 2. **Build the WASM Module**
   ```
   mkdir build && cd build
-  cmake -DWASI_SDK_DIR=/opt/wasi-sdk -DCMAKE_TOOLCHAIN_FILE=/opt/wamr-sdk/app-sdk/wamr_toolchain.cmake ..
+  cmake ..
   make
   ```
 

docs/samples/blinky/index.md

@@ -24,7 +24,7 @@ cd samples/blinky
 **2.** Next, build the blinky sample using the following commands:
 ```
 mkdir build && cd build
-cmake -DWASI_SDK_DIR=/opt/wasi-sdk -DCMAKE_TOOLCHAIN_FILE=/opt/wamr-sdk/app-sdk/wamr_toolchain.cmake ..
+cmake ..
 make
 ```
 

docs/samples/hello-world/index.md

@@ -24,7 +24,7 @@ cd samples/hello-world
 **2.** Next, build the hello world sample using the following commands:
 ```
 mkdir build && cd build
-cmake -DWASI_SDK_DIR=/opt/wasi-sdk -DCMAKE_TOOLCHAIN_FILE=/opt/wamr-sdk/app-sdk/wamr_toolchain.cmake ..
+cmake ..
 make
 ```