Wrong description for return value of libgstc::gstc_client_free()

[rbenet]

On the description for libgstc::gstc_clientfree() in libgstc.h, it says it returns:

when in fact it is a void function.

gstd-1.x/libgstc/c/libgstc.h

Line 162 in 7889d82

* Returns: A newly allocated GstClient. Use gstc_client_free() after