limit no of jobs

Author: bartlomieju

.github/workflows/ci-job.yml

@@ -132,5 +132,6 @@ jobs:
       CARGO_INCREMENTAL: 0
       GH_ACTIONS: 1
       RUST_BACKTRACE: full
-      RUSTFLAGS: -D warnings -C debuginfo=0
+      RUSTFLAGS: -D warnings
       CARGO_PROFILE_RELEASE_DEBUG: false
+      CARGO_BUILD_JOBS: 1