heap-buffer-overflow in flb signv4 uri normalize path

heap-buffer-overflow in flb signv4 uri normalize path: a task in MiMo-V2.6-RL-harbor-cyber: MiMo-V2.6-RL Cyber (Harbor) (Harbor dataset). AddressSanitizer: heap-buffer-overflow in function flb signv4 uri normalize path in file fluent-bit/src/flb signv4.c