Bumped release stage version (#13307)

Author: lazebnyi

airbyte-config/init/src/main/resources/seed/source_definitions.yaml

@@ -394,7 +394,7 @@
   documentationUrl: https://docs.airbyte.io/integrations/sources/hubspot
   icon: hubspot.svg
   sourceType: api
-  releaseStage: beta
+  releaseStage: generally_available
 - name: IBM Db2
   sourceDefinitionId: 447e0381-3780-4b46-bb62-00a4e3c8b8e2
   dockerRepository: airbyte/source-db2