Use the packaged cargo lock file when installing cargo2junit in the CI build

Author: mfitz

.github/workflows/test.yml

@@ -86,7 +86,7 @@ jobs:
           key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('Cargo.lock') }}
       - name: Generate test result and coverage report
         run: |
-          cargo install cargo2junit grcov;
+          cargo install --locked cargo2junit grcov;
           cargo test $CARGO_OPTIONS -v -- -Z unstable-options --format json | cargo2junit > results.xml;
           zip -0 ccov.zip `find . \( -name "$PROJECT_NAME_UNDERSCORE*.gc*" \) -print`;
           grcov ccov.zip -s . -t lcov --llvm --ignore-not-existing --ignore "/*" --ignore "tests/*" -o lcov.info;