man: fix a trivial typo in MPI_Neighbor_allgather.3in

ompi/mpi/man/man3/MPI_Neighbor_allgather.3in

@@ -31,7 +31,7 @@ MPI_NEIGHBOR_ALLGATHER(\fISENDBUF\fP,\fI SENDCOUNT\fP,\fI SENDTYPE\fP,\fI RECVBU
 	INTEGER	\fISENDCOUNT\fP,\fI SENDTYPE\fP,\fI RECVCOUNT\fP,\fI RECVTYPE\fP,\fI COMM\fP,
 	INTEGER	\fIIERROR\fP
 
-MPI_NEIGHBOR_ALLGATHER(\fISENDBUF\fP,\fI SENDCOUNT\fP,\fI SENDTYPE\fP,\fI RECVBUF\fP,\fI RECVCOUNT\fP,\fI
+MPI_INEIGHBOR_ALLGATHER(\fISENDBUF\fP,\fI SENDCOUNT\fP,\fI SENDTYPE\fP,\fI RECVBUF\fP,\fI RECVCOUNT\fP,\fI
 		RECVTYPE\fP,\fI COMM\fP, \fPREQUEST\fI,\fI IERROR\fP)
 	<type>	\fISENDBUF\fP (*), \fIRECVBUF\fP (*)
 	INTEGER	\fISENDCOUNT\fP,\fI SENDTYPE\fP,\fI RECVCOUNT\fP,\fI RECVTYPE\fP,\fI COMM\fP,