Fix link to cargo config file

boards/rp-pico/README.md

@@ -60,7 +60,7 @@ To start a basic project from scratch, create a project using `cargo new project
 project directory, run `cargo add rp-pico`, `cargo add cortex-m-rt`, and `cargo add panic-halt`. The
 first command will add this HAL (Hardware Abstraction Layer), the second is required for the `#[entry]` macro, and _panic-halt_ creates a simple panic function, which just halts.
 
-You'll also need to copy the cargo config file from the [repo](https://github.com/rp-rs/rp-hal-boards/blob/main/.cargo/config). It specifies the target and optimizing flags to the linker. You'll also need to copy [_memory.x_](https://github.com/rp-rs/rp-hal-boards/blob/main/memory.x) to your project root. This file tells the linker the flash and RAM layout, so it won't clobber the bootloader or write to an out of bounds memory address. 
+You'll also need to copy the cargo config file from the [repo](https://github.com/rp-rs/rp-hal-boards/blob/main/.cargo/config.toml). It specifies the target and optimizing flags to the linker. You'll also need to copy [_memory.x_](https://github.com/rp-rs/rp-hal-boards/blob/main/memory.x) to your project root. This file tells the linker the flash and RAM layout, so it won't clobber the bootloader or write to an out of bounds memory address. 
 
 The simplest working example, which does nothing except loop forever, is: