refactor: improve Copilot workflow based on code review

Co-authored-by: josecelano <[email protected]>

Author: Copilot

.github/workflows/copilot-setup-steps.yml

@@ -15,6 +15,7 @@ jobs:
   # The job MUST be called `copilot-setup-steps` or it will not be picked up by Copilot.
   copilot-setup-steps:
     runs-on: ubuntu-latest
+    timeout-minutes: 30
 
     # Set the permissions to the lowest permissions possible needed for your steps.
     # Copilot will be given its own token for its operations.
@@ -28,8 +29,6 @@ jobs:
 
       - name: Set up Rust toolchain
         uses: dtolnay/rust-toolchain@stable
-        with:
-          toolchain: stable
 
       - name: Enable Rust cache
         uses: Swatinem/rust-cache@v2