fix: syntax error

Author: psteinroe

.github/actions/setup-monorepo/action.yml

@@ -13,6 +13,6 @@ runs:
  using: composite
  steps:
  - name: 🏗 Setup Toolchain
- - uses: actions-rs/toolchain@v1
+   uses: actions-rs/toolchain@v1
  with:
  toolchain: ${{ inputs.toolchain }}