man/io_uring_buf_ring_advance.3: Fix return type
This function doesn't return anything, the return type should be void.
Fixes: ("Add man pages for shared provided buffer rings")
@@ -9,7 +9,7 @@ io_uring_buf_ring_advance \- advance index of provided buffer in buffer ring
.nf
.B #include <liburing.h>
.PP
-.BI "int io_uring_buf_ring_advance(struct io_uring_buf_ring *" br ",
+.BI "void io_uring_buf_ring_advance(struct io_uring_buf_ring *" br ",
.BI " int " count ");"
.fi
.SH DESCRIPTION
