update git deps

[syheliel]

This PR will fix the compile error due to:

/home/xxx/workspace/ppl/ppl.llm.serving/src/models/llama/../../utils/mpsc_request_scheduler.h:21:10: fatal error: ppl/common/event_count.h: No such file or directory
#include "ppl/common/event_count.h"
^~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

[ouonline]

The latest version of ppl.nn does not support the openpmx domain in ppl.pmx. we'll stick to llm_v1 until openpmx is fully supported by ppl.nn.

As a workaround, ppl.common is changed to the latest version in OpenPPL/ppl.nn@0c19aae. please rm -rf deps/pplnn* and try again.