Repository: bugsnag/bugsnag-python

Issue:
DeprecationWarning: The Event "metadata" argument has been replaced with "metadata" - Typo
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### Describe the bug
typo in Depercation warning

it should be `DeprecationWarning: The Event "meta_data" argument has been replaced with "metadata"`

### Steps to reproduce
![image](https://user-images.githubusercontent.com/7542220/173654706-7c45988e-5aed-49d0-b996-a0db0fc8fa8d.png)


### Environment
* Bugsnag version: 4.2.1
* Python version: 3.9.13
* Integration framework version:
    * ASGI: Daphne
    * Celery: 5.2
    * Django: 4.0



Discussion:

Patch:
diff --git a/bugsnag/event.py b/bugsnag/event.py
index a06cae3..1b18a9d 100644
--- a/bugsnag/event.py
+++ b/bugsnag/event.py
@@ -113,7 +113,7 @@ class Event:
 
         self.metadata = {}  # type: Dict[str, Dict[str, Any]]
         if 'meta_data' in options:
-            warnings.warn('The Event "metadata" argument has been replaced ' +
+            warnings.warn('The Event "meta_data" argument has been replaced ' +
                           'with "metadata"', DeprecationWarning)
             for name, tab in options.pop("meta_data").items():
                 self.add_tab(name, tab)
@@ -126,8 +126,8 @@ class Event:
 
     @property
     def meta_data(self) -> Dict[str, Dict[str, Any]]:
-        warnings.warn('The Event "metadata" property has been replaced ' +
-                      'with "meta_data".', DeprecationWarning)
+        warnings.warn('The Event "meta_data" property has been replaced ' +
+                      'with "metadata".', DeprecationWarning)
         return self.metadata
 
     @property


Test patch:
diff --git a/tests/test_event.py b/tests/test_event.py
index a5d91b3..7eda818 100644
--- a/tests/test_event.py
+++ b/tests/test_event.py
@@ -358,7 +358,7 @@ class TestEvent(unittest.TestCase):
 
             assert len(records) > 0
             i = len(records) - 1
-            assert str(records[i].message) == ('The Event "metadata" ' +
+            assert str(records[i].message) == ('The Event "meta_data" ' +
                                                'argument has been replaced ' +
                                                'with "metadata"')
             assert event.metadata['nuts']['almonds']
diff --git a/tests/test_notify.py b/tests/test_notify.py
index fc445b0..00c918e 100644
--- a/tests/test_notify.py
+++ b/tests/test_notify.py
@@ -843,7 +843,7 @@ class TestBugsnag(IntegrationTest):
                            meta_data={'fruit': {'apples': 2}})
 
             assert len(records) == 1
-            assert str(records[0].message) == ('The Event "metadata" ' +
+            assert str(records[0].message) == ('The Event "meta_data" ' +
                                                'argument has been replaced ' +
                                                'with "metadata"')