Update CI version to 2.1.0-pre

sushi-config.yaml

@@ -9,7 +9,7 @@ name: SQLonFHIR
 title: SQL on FHIR
 description: A specification for defining portable views of FHIR data that can be easily queried using tools such as SQL.
 status: draft # draft | active | retired | unknown
-version: 2.0.0
+version: 2.1.0-pre
 fhirVersion: 5.0.0 # https://www.hl7.org/fhir/valueset-FHIR-version.html
 copyrightYear: 2023+
 releaseLabel: release # ci-build | draft | qa-preview | ballot | trial-use | release | update | normative+trial-use