message: Fix referring to the processor when I meant provider
diff: '@backstage/plugin-catalog-backend-module-github': minor
  ---
  -Added the ability for the GitHub discovery processor to validate that catalog files exist before emitting them.
  +Added the ability for the GitHub discovery provider to validate that catalog files exist before emitting them.
  Users can now set the `validateLocationsExist` property to `true` in their GitHub discovery configuration to opt in to this feature.
  This feature only works with `catalogPath`s that do not contain wildcards.
  -When `validateLocationsExist` is set to `true`, the GitHub discovery processor will retrieve the object from the
  +When `validateLocationsExist` is set to `true`, the GitHub discovery provider will retrieve the object from the
  repository at the provided `catalogPath`.
  If this file exists and is non-empty, then it will be emitted as a location for further processing.
  If this file does not exist or is empty, then it will not be emitted.
  