No need to run autogen.sh in jemalloc directory

[zhaozihanzzh]

The doc/F-Stack_Build_Guide.md says when compiling redis we need to execute cd app/redis-6.2.6/deps/jemalloc first. Then we should execute ./autogen.sh. However, doing so may cause redis Segmentation Fault on my machine (Debian 12 with Linux 6.1.0). According to the official README.md in redis, I guess we don't need to run autogen.sh in jemalloc directory when building redis.