Fixed typo in partitioning docs hash -> hash (#201)

Author: selcuk

docs/source/table_partitioning.rst

@@ -196,7 +196,7 @@ You can look at :class:`psqlextra.partitioning.PostgresCurrentTimePartitioningSt
 Manually managing partitions
 ----------------------------
 
-If you are using list or has partitioning, you most likely have a fixed amount of partitions that can be created up front using migrations or using the schema editor.
+If you are using list or hash partitioning, you most likely have a fixed amount of partitions that can be created up front using migrations or using the schema editor.
 
 Using migration operations
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