VSCode, Rust-analyzer recompiling issue in Bevy 0.13.2

## How can Bevy's documentation be improved?
In the [Setup](https://bevyengine.org/learn/quick-start/getting-started/setup/) page, it is given that the new cargo config file should be located in `/.cargo/config.toml`. I had a problem where the game would recompile every time i ran it,

My suggestion is to add an extra rust-analyzer setting flag to force it use the new `config.toml` file.

In `settings.json` add the `"rust-analyzer.cargo.targetDir": true` flag to force rust-analyzer.

Open the Setup page linked in the issue and review the guidance around /.cargo/config.toml. Check the VSCode settings.json guidance and add the rust-analyzer.cargo.targetDir setting described in the report. Done means the setup documentation includes this workaround for avoiding repeated recompilation.

Written by the indexing model from the issue text.