Bump PGSTAT_FILE_FORMAT_ID

This was missed in 960869da

Reported-By: Laurenz Albe
Discussion: https://postgr.es/m/4f0aacc5fe1b4bfafa32b36ecd97469fae526a75.camel@cybertec.at

src/include/pgstat.h

@@ -692,7 +692,7 @@ typedef union PgStat_Msg
  * ------------------------------------------------------------
  */
 
-#define PGSTAT_FILE_FORMAT_ID	0x01A5BC9F
+#define PGSTAT_FILE_FORMAT_ID	0x01A5BCA0
 
 /* ----------
  * PgStat_StatDBEntry			The collector's data per database