spelling: behaviour

Signed-off-by: Josh Soref <[email protected]>

Author: jsoref

cpp/ql/src/definitions.ql

@@ -13,6 +13,6 @@ where
   def = definitionOf(e, kind) and
   // We need to exclude definitions for elements inside template instantiations,
   // as these often lead to multiple links to definitions from the same source location.
-  // LGTM does not support this bevaviour.
+  // LGTM does not support this behaviour.
   not e.isFromTemplateInstantiation(_)
 select e, def, kind