lint: change base tuple order in SimpleEnvelope

Latest ruff complains about Generic[T] not being the last base class in
the bases tuple of Simple Envelope (generic-not-last-base-class
(PYI059)).

This commit applies the default fix by changing the order of the bases.
While this can change the MRO, there shouldn't be a change of behavior
given the used bases.

See https://docs.astral.sh/ruff/rules/generic-not-last-base-class/ for
details.

Signed-off-by: Lukas Puehringer <[email protected]>

Author: Lukas Puehringer

tuf/api/dsse.py

@@ -34,7 +34,7 @@
 from tuf.api.serialization import DeserializationError, SerializationError
 
 
-class SimpleEnvelope(Generic[T], BaseSimpleEnvelope):
+class SimpleEnvelope(BaseSimpleEnvelope, Generic[T]):
     """Dead Simple Signing Envelope (DSSE) for TUF payloads.
 
     * Sign with ``self.sign()`` (inherited).