Wrong deployed schema in https://stac-extensions.github.io/ssys/v1.1.0/schema.json

[J-Christophe]

The deployed schema at https://stac-extensions.github.io/ssys/v1.1.0/schema.json does not match the source schema defined in the repository:
https://github.com/stac-extensions/ssys/blob/main/json-schema/schema.json

Issue:

• The definition of target_class differs between the two versions.
• This inconsistency could lead to errors or confusion for users and tools relying on the schema.

Steps to verify:

• Open the raw schema in the repository: schema.json.
• Search for target_class.
• Compare it with the same field in the deployed version: v1.1.0/schema.json.

Expected fix:
Ensure the deployed schema matches the source schema in the repository.

[jlaura]

Closed by #14.