ci.yml: apply CARGO_INCREMENTAL for all jobs

Author: oech3

.github/workflows/ci.yml

@@ -4,6 +4,7 @@ name: Basic CI
 
 env:
   CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: "0"
 
 jobs:
   check:
@@ -80,7 +81,6 @@ jobs:
     - name: Test
       run: cargo test --no-fail-fast
       env:
-        CARGO_INCREMENTAL: "0"
         RUSTC_WRAPPER: ""
         RUSTFLAGS: "-Cinstrument-coverage -Zcoverage-options=branch -Ccodegen-units=1 -Copt-level=0 -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort"
         RUSTDOCFLAGS: "-Cpanic=abort"