Fix typos in parallel query docs.

Amit Kapila · Amit Kapila · commit 91595d181707 · 2020-01-03T11:27:50.000+05:30
Reported-by: Jon Jensen Author: Jon Jensen Reviewed-by: Amit Kapila and Robert Haas Backpatch-through: 10 Discussion: https://postgr.es/m/nycvar.YSQ.7.76.1912301807510.9899@ybpnyubfg
diff --git a/doc/src/sgml/parallel.sgml b/doc/src/sgml/parallel.sgml
@@ -310,7 +310,7 @@ EXPLAIN SELECT * FROM pgbench_accounts WHERE filler LIKE '%x%';
         scan</>, the cooperating processes take turns reading data from the
         index.  Currently, parallel index scans are supported only for
         btree indexes.  Each process will claim a single index block and will
-        scan and return all tuples referenced by that block; other process can
+        scan and return all tuples referenced by that block; other processes can
         at the same time be returning tuples from a different index block.
         The results of a parallel btree scan are returned in sorted order
         within each worker process.
