Fix s/pluggins/plugins/ typo in two comments.

Michael Paquier

src/backend/replication/logical/logicalfuncs.c

@@ -394,7 +394,7 @@ pg_logical_slot_get_changes_guts(FunctionCallInfo fcinfo, bool confirm, bool bin
 		MemoryContextSwitchTo(oldcontext);
 
 		/*
-		 * Check whether the output pluggin writes textual output if that's
+		 * Check whether the output plugin writes textual output if that's
 		 * what we need.
 		 */
 		if (!binary &&

src/include/catalog/objectaccess.h

@@ -13,7 +13,7 @@
 /*
  * Object access hooks are intended to be called just before or just after
  * performing certain actions on a SQL object.  This is intended as
- * infrastructure for security or logging pluggins.
+ * infrastructure for security or logging plugins.
  *
  * OAT_POST_CREATE should be invoked just after the object is created.
  * Typically, this is done after inserting the primary catalog records and