Only apply Z symbol to ASAN job

.github/workflows/ci.yml

@@ -17,8 +17,6 @@ env:
   # This should be occasionally updated.
   RUST_NIGHTLY_TOOLCHAIN: nightly-2024-12-01
   ROOT_PATH: .
-  RUSTDOCFLAGS: -Zsanitizer=address
-  RUSTFLAGS: -Zsanitizer=address
   CDN: https://dnglbrstg7yg.cloudfront.net
   # enable unstable features for testing
   S2N_UNSTABLE_CRYPTO_OPT_TX: 100
@@ -285,6 +283,9 @@ jobs:
           ${{ matrix.target != 'native' && 'cross' || 'cargo' }} test --workspace ${{ matrix.exclude }} ${{ matrix.target != 'native' && format('--target {0}', matrix.target) || '' }} ${{ matrix.args }}
 
       - name: Run Unit Tests under ASAN
+        env:
+          RUSTDOCFLAGS: -Zsanitizer=address
+          RUSTFLAGS: -Zsanitizer=address
         run: |
           cargo test \
             -Zbuild-std \