Changed "bundle" to "Bundle" where appropriate for consistency.
Changed "bundle" to "Bundle" where appropriate for consistency.

fhir-drills/fhir-drills.github.io,fhir-drills/fhir-drills.github.io,fhir-drills/fhir-drills.github.io,fhir-drills/fhir-drills.github.io