Bump pinned libhegel to 0.37.3 - #127

No file matched to [/home/runner/work/hegel-cpp/hegel-cpp/**/*requirements*.txt,/home/runner/work/hegel-cpp/hegel-cpp/**/*requirements*.in,/home/runner/work/hegel-cpp/hegel-cpp/**/*constraints*.txt,/home/runner/work/hegel-cpp/hegel-cpp/**/*constraints*.in,/home/runner/work/hegel-cpp/hegel-cpp/**/pyproject.toml,/home/runner/work/hegel-cpp/hegel-cpp/**/uv.lock,/home/runner/work/hegel-cpp/hegel-cpp/**/*.py.lock]. The cache will never get invalidated. Make sure you have checked out the target repository and configured the cache-dependency-glob input correctly.