ci: generate lockfile first

Author: WaterWhisperer

.github/workflows/CI.yml

@@ -56,6 +56,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v5
+    - uses: dtolnay/rust-toolchain@stable
     - name: Remove the example crates to exclude effects to dependencies from them
       run: rm -r ./examples/* && cargo new --lib --edition 2021 examples/dummy
     # we could probably replace all these with the cargo MSRV resolver ...
@@ -68,8 +69,9 @@ jobs:
     - run: cargo update -p async-compression --precise 0.4.23
     - run: cargo update -p flate2 --precise 1.0.35
     - run: cargo update -p itoa --precise 1.0.15
+    - run: cargo generate-lockfile
     - uses: dtolnay/[email protected]
-    - run: cargo check -p tower-http --all-features
+    - run: cargo check -p tower-http --all-features --locked
 
   style:
     needs: check