message: Add McKesson to adopters
diff: @@ -118,3 +118,4 @@ _If you're using Backstage in your organization, please try to add your company
  | [Pachama](https://pachama.com/) | [Aron Gates](https://github.com/agates4) | Internal Developer Portal, a catalog of all microservices, architecture documentation, and templates to generate developer resources. |
  | [SEEK](https://www.seek.com.au) | [Jahred Hope](https://github.com/jahredhope) | Developer portal for developer tooling and technical documentation. |
  | [Marks & Spencer](https://www.marksandspencer.com/) | [Kamal Cheriyath](https://github.com/kcheriyath) | Centralised discovery, adoption and devops automation hub for Engineering & Architecture. |
  +| [McKesson](https://www.mckesson.com/) | [Agnel Antony](https://github.com/aantony2) | Internal Developer Platform for developer gated CI/CD templates, technical documentation, cloud automation service catalog, etc. |
  