fix broken example includes for #9788

[chobermaier]

I think with the merge of #9788 yesterday the include statements of the new WASI examples were not quite spot on.

I'm not entirely sure if I got the right file paths to fix, but looking at the diff of #9788 I think they might be the right ones.

Running mdbook build --open to build the doc gave these errors:

2025-01-08 15:25:26 [INFO] (mdbook::book): Book building has started
2025-01-08 15:25:26 [ERROR] (mdbook::preprocess::links): Error updating "{{#include ../examples/wasi/main.rs}}", Could not read file for link {{#include ../examples/wasi/main.rs}} (/home/christian/repos/wasmtime/docs/./../examples/wasi/main.rs)
2025-01-08 15:25:26 [WARN] (mdbook::preprocess::links): Caused By: No such file or directory (os error 2)
2025-01-08 15:25:26 [ERROR] (mdbook::preprocess::links): Error updating "{{#include ../examples/wasi-async/main.rs}}", Could not read file for link {{#include ../examples/wasi-async/main.rs}} (/home/christian/repos/wasmtime/docs/./../examples/wasi-async/main.rs)
2025-01-08 15:25:26 [WARN] (mdbook::preprocess::links): Caused By: No such file or directory (os error 2)
2025-01-08 15:25:26 [ERROR] (mdbook::preprocess::links): Error updating "{{#include ../examples/wasi/main.c}}", Could not read file for link {{#include ../examples/wasi/main.c}} (/home/christian/repos/wasmtime/docs/./../examples/wasi/main.c)
2025-01-08 15:25:26 [WARN] (mdbook::preprocess::links): Caused By: No such file or directory (os error 2)
2025-01-08 15:25:26 [INFO] (mdbook::book): Running the html backend
2025-01-08 15:25:26 [INFO] (mdbook): Opening web browser

I changed the includes to those files:

• https://github.com/bytecodealliance/wasmtime/blob/main/examples/wasip2/main.rs
• https://github.com/bytecodealliance/wasmtime/blob/main/examples/wasip2-async/main.rs
• https://github.com/bytecodealliance/wasmtime/blob/main/examples/wasip1/main.c

[alexcrichton]

Oops, thanks!