[BUG] failed to register Get route for /:path pattern: insertion failed due to conflict with previously registered route: //',

### Is there an existing issue for this?

- [X] I have searched the existing issues

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

0.0.17

### What version of `wrangler` are you using?

3.3.0

### Describe the bug

Unable to create such routing
```rust
Router::new()
.get("/abc/:path", |_req, ctx| {
Response::ok("Hello world")
})
.get("/:path", |_req, ctx| {
Response::ok("Hello world2")
})
.run(req, env).await
```
error:
```
panicked at 'failed to register Get route for /:path pattern: insertion failed due to conflict with previously registered route: //', /home/gytis/.local/share/cargo/registry/src/index.crates.io-6f17d22bba15001f/worker-0.0.17/src/router.rs:327:21
```

### Steps To Reproduce

Running code specified above