Update python-avro to version 1.11.1 / rev 12 via SR 993435
    
    https://build.opensuse.org/request/show/993435
    by user mcepl + dimstar_suse
    - Update to 1.11.1 (from GitHub release notes):
      - Avro specification
        - Clarify which names are allowed to be qualified with
          namespaces
        - Inconsistent behaviour on types as invalid names
        - Clarify how fullnames are created, with example
        - IDL: add syntax to create optional fields
        - Improve docs for logical type annotation
      - Python
        - Scale assignment optimization
        - "Scale" property from decimal object
        - Byte reading in avro.io does not assert bytes read
        - validate the default value of an enum field
        - Pass LogicalType to BytesDecimalSchema
      - Website
        - Website refactor
        - Document IDL support in IDEs