Fix the wrong cmake path in wasi example comments (#7343)

examples/wasi/main.c

@@ -3,7 +3,7 @@ Example of instantiating a WebAssembly which uses WASI imports.
 
 You can compile and run this example on Linux with:
 
-   cmake example/
+   cmake examples/
    cargo build --release -p wasmtime-c-api
    cc examples/wasi/main.c \
        -I crates/c-api/include \

examples/wasi/main.rs

@@ -2,7 +2,7 @@
 
 /*
 You can execute this example with:
-    cmake example/
+    cmake examples/
     cargo run --example wasi
 */