Update PGFILEDESC

This field was holding pg_stat_statements description. Update in with
pg_stat_monitor once.

Author: artemgavrilov

Makefile

@@ -6,7 +6,7 @@ DATA = pg_stat_monitor--2.0.sql \
 	pg_stat_monitor--1.0--2.0.sql pg_stat_monitor--2.0--2.1.sql \
 	pg_stat_monitor--2.1--2.2.sql pg_stat_monitor--2.2--2.3.sql
 
-PGFILEDESC = "pg_stat_monitor - execution statistics of SQL statements"
+PGFILEDESC = "pg_stat_monitor - Query Performance Monitoring Tool for PostgreSQL"
 
 LDFLAGS_SL += $(filter -lm, $(LIBS))