style: rename self_inner to self

Signed-off-by: Vinay Singh <vinay@verid.id>

Author: vinaysingh8866

acapy_agent/wallet/tests/test_kanon_wallet_errors_and_endpoint.py

@@ -312,7 +312,7 @@ async def test_assign_kid_and_get_by_kid_success(wallet_env, monkeypatch):
     assert got.verkey == info.verkey and got.kid == "kid-ok"
 
     class BadKeyTypes(module.KeyTypes.__class__):
-        def from_key_type(self_inner, *_):
+        def from_key_type(self, *_):
             return None
 
     monkeypatch.setattr(