[ci skip] Fix docs about QB caching
It doesn't support set() ...
Related: #4175
diff --git a/user_guide_src/source/database/query_builder.rst b/user_guide_src/source/database/query_builder.rst
index 9c3ff30..5d9ae45 100644
--- a/user_guide_src/source/database/query_builder.rst
+++ b/user_guide_src/source/database/query_builder.rst
@@ -1018,7 +1018,7 @@
.. note:: The following statements can be cached: select, from, join,
- where, like, group_by, having, order_by, set
+ where, like, group_by, having, order_by
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