chore: delete unnecessary new line

Signed-off-by: Kotaro Yoshimoto <[email protected]>

.github/workflows/cppcheck-differential.yaml

@@ -36,7 +36,6 @@ jobs:
         run: |
           echo "changed_files=$(git diff --name-only "origin/${{ github.base_ref }}"...HEAD | grep -E '\.(cpp|hpp)$' | tr '\n' ' ' || true)" >> $GITHUB_OUTPUT
         shell: bash
-
       - name: Run Cppcheck on changed files
         continue-on-error: true
         id: cppcheck