message: docs: Mention context update in RELEASE_NOTES.md
diff: ### Configuration changes
  You might need to make changes to your v2 configuration if you use a custom config.
  +The `@context` needs to be updated to
  +`https://linkedsoftwaredependencies.org/bundles/npm/@solid/community-server/^3.0.0/components/context.jsonld`.
  +
  The following changes pertain to the imports in the default configs:
  - A new configuration option needs to be imported:
  - `/app/variables/default/json` contains everything related to parsing CLI arguments
  