message: fix header formatting problem
diff: # Useful ECSQL Queries
  The following ECSQL select statements are examples of useful queries that an app backend or a service might want to perform. They are written in a form that can be executed in backend code.
  -## Look up element by code *value*
  +## Look up element by code value
  ``` ts
  [[include:ECSQL-backend-queries.select-element-by-code-value]]
  