tmp: Change zephyr toolchain to show error

Change the docs.yml workflow to have a different value of toolchain.
This will demonstrate an issue with the action-zephyr-setup action.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

.github/workflows/docs.yml

@@ -29,7 +29,7 @@ jobs:
         with:
           app-path: zephyr-rust-lang
           manifest-file-name: ci-manifest.yml
-          toolchains: arm-zephyr-eabi:riscv64-zephyr-elf
+          toolchains: arm-zephyr-eabi
 
       - name: Install Rust Targets
         shell: bash