Log Message:
spdlog: updated to 1.15.1

1.15.1

Update bundled fmt version to 11.1.3
Use fwrite_unlocked() if available
On-demand truncation for basic file sinks
Allow manual rotation of rotating_file_sink
Make null_sink final
Fix: Add explicit fmt:: and std:: to avoid ambiguous calls
Fix: Pass /utf-8 only when the compiler is MSVC
Fix: Support bin_to_hex() when using std::format
Support custom environment variables for load_env_levels
Fix: Added a lock to rotate_now()
Fix: Update to_string_view function for fmt 11.1
Fix: Remove unused to_string_view overload in fmt >= 11.1
Fix: Use string_view_literals to resolve issues
Fix: Added a lock to set_color_mode(..) in ansicolor_sink
Fix: Corrected comment in daily_file_sink
Fix: Compatibility with fmtlib 11.1.1