[BUG] hardcoded version of `worker-build` in starter template causing issues with preinstalled versions of wasm-pac

### Is there an existing issue for this?

- [X] I have searched the existing issues

### What version of `workers-rs` are you using?

0.0.14

### Describe the bug

The worker template has `cargo install worker-build --version 0.0.7`. This hardcoded build command will fail id `wasm-pack` is pre-installed on the system, since `worker-build` 0.0.7 seems to try and force install it on each run

### Steps To Reproduce

_No response_

Start by locating the worker template containing `cargo install worker-build --version 0.0.7` and reproduce the failure with a pre-installed `wasm-pack`. Confirm the template no longer fails because of the hardcoded `worker-build` version, then verify the generated setup command works with the reported environment.

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