fix: readd missing rust toolchain to fix CI

Author: cprussin

.github/workflows/ci-pre-commit.yml

@@ -24,6 +24,7 @@ jobs:
       - name: Install Rust versions
         run: |
           rustup install 1.73.0
+          rustup install 1.66.1
       - name: Install protoc
         uses: arduino/setup-protoc@v3
         with: