fixed double import in tracing lib

lib/charms/tempo_k8s/v2/tracing.py

@@ -97,7 +97,7 @@ def __init__(self, *args):
 )
 from ops.framework import EventSource, Object
 from ops.model import ModelError, Relation
-from pydantic import BaseModel, ConfigDict, Field
+from pydantic import BaseModel, Field
 
 # The unique Charmhub library identifier, never change it
 LIBID = "12977e9aa0b34367903d8afeb8c3d85d"
@@ -107,7 +107,7 @@ def __init__(self, *args):
 
 # Increment this PATCH version before using `charmcraft publish-lib` or reset
 # to 0 if you are raising the major API version
-LIBPATCH = 8
+LIBPATCH = 9
 
 PYDEPS = ["pydantic"]
 
@@ -338,7 +338,7 @@ class Config:
     class ProtocolType(BaseModel):
         """Protocol Type."""
 
-        model_config = ConfigDict(
+        model_config = ConfigDict(  # type: ignore
             # Allow serializing enum values.
             use_enum_values=True
         )