Fix a typo in worker.c

diff --git a/src/backend/replication/logical/worker.c b/src/backend/replication/logical/worker.c
index fa4f3b6..2d7770d 100644
--- a/src/backend/replication/logical/worker.c
+++ b/src/backend/replication/logical/worker.c
@@ -351,7 +351,7 @@ slot_store_cstrings(TupleTableSlot *slot, LogicalRepRelMapEntry *rel,
 }
 
 /*
- * Modify slot with user data provided as C strigs.
+ * Modify slot with user data provided as C strings.
  * This is somewhat similar to heap_modify_tuple but also calls the type
  * input function on the user data as the input is the text representation
  * of the types.