fix: add git safe.directory for containerized CI with persistent cache

When using persistent cargo cache mounted from host directory, the container
user differs from the directory owner, causing git "dubious ownership" error.
This fix adds `git config --global --add safe.directory '*'` before cargo
commands in containerized jobs.

.github/workflows/checks.yml

@@ -50,6 +50,7 @@ jobs:
       - name: script
         id: required
         run: |
+          git config --global --add safe.directory '*'
           cargo clippy --all-targets --all-features --locked --workspace --quiet
 
   check-try-runtime:
@@ -77,6 +78,7 @@ jobs:
       - name: script
         id: required
         run: |
+          git config --global --add safe.directory '*'
           cargo check --locked --all --features try-runtime --quiet
           # Check that teyrchain-template will compile with `try-runtime` feature flag.
           cargo check --locked -p teyrchain-template-node --features try-runtime