Update inplaceBlockConversions.h

src/Interpreters/inplaceBlockConversions.h

@@ -17,7 +17,7 @@ class ActionsDAG;
 using ActionsDAGPtr = std::shared_ptr<ActionsDAG>;
 
 /// Create actions which adds missing defaults to block according to required_columns using columns description.
-/// Return nullptr if no cations required.
+/// Return nullptr if no actions required.
 ActionsDAGPtr evaluateMissingDefaults(
     const Block & header,
     const NamesAndTypesList & required_columns,