ci: run sembr in release mode

Author: tshepang

src/doc/rustc-dev-guide/.github/workflows/ci.yml

@@ -97,4 +97,4 @@ jobs:
         continue-on-error: true
         run: |
           # using split_inclusive that uses regex feature that uses an unstable feature
-          RUSTC_BOOTSTRAP=1 cargo run --manifest-path ci/sembr/Cargo.toml src
+          RUSTC_BOOTSTRAP=1 cargo run --release --manifest-path ci/sembr/Cargo.toml src