[guide/examples] Switch from --target no-modules to --target web now

[BGR360]

All major browsers have supported ES modules in web workers for at least a year now. Firefox was the last one to catch up, it seems, and it added support in version 114 (2023-06). See MDN.

As a newcomer wanting to play around with Wasm in web workers, I want to know the most modern/standardized way to do things with wasm-bindgen.

Therefore, I request that the following examples and pages in the wasm-bindgen guide be updated to use the newer --target web instead of --target no-modules.

wasm-bindgen/guide/src/examples/wasm-in-web-worker.md

Lines 13 to 16 in e4f8c45

	At the time of this writing, only Chrome supports modules in web workers, e.g.
	Firefox does not. To have compatibility across browsers, the whole example is
	set up without relying on ES modules as target. Therefore we have to build
	with `--target no-modules`. The full command can be found in `build.sh`.

wasm-bindgen/guide/src/examples/raytrace.md

Lines 60 to 61 in e4f8c45

	wasm module at this time to provide the appropriate memory object. This demo
	uses `--target no-modules`, because Firefox does not support modules in workers.

[daxpedda]

This should be quite straightforward to do, I'm happy to review a PR!