Reverted incorrect capitalization

doc/Ecosystem.md

@@ -29,7 +29,7 @@ We suggest a Linux or OSX development environment, though Rust related tools are
 
 The [rustup](https://www.rustup.rs/), tool manager allows you to manage multiple tool chain installations. Rust is distributed in three channels (`stable`, `beta` and `nightly`). You may set the default toolchain:
 ```
-rustup default nightly-2017-10-22-x86_64-unknown-Linux-gnu 
+rustup default nightly-2017-10-22-x86_64-unknown-linux-gnu 
 ```
 and get information on the status of `rustup`
 ```
@@ -87,4 +87,4 @@ You may choose to use the [gitlens](https://github.com/eamodio/vscode-gitlens) e
 
 ## Native Debug
 The [Native Debug](https://github.com/WebFreak001/code-debug) extension allows for debugging Rust application from within `vscode`. Native Debug supports both `lldb` (LLVM) and `gdb` (GNU)
-debuggers. For embedded development, you will use the latter. See Embedded.md (TODO) for further details.
\ No newline at end of file
+debuggers. For embedded development, you will use the latter. See Embedded.md (TODO) for further details.