Fix typo in the word 'available' (#9599)

`avaible` -> `available`

tests/providers/apache/hive/transfers/test_mssql_to_hive.py

@@ -34,7 +34,7 @@ except ImportError:
     pymssql = None
 
 
-@unittest.skipIf(PY38, "Mssql package not avaible when Python >= 3.8.")
+@unittest.skipIf(PY38, "Mssql package not available when Python >= 3.8.")
 @unittest.skipIf(pymssql is None, 'pymssql package not present')
 class TestMsSqlToHiveTransfer(unittest.TestCase):
 

tests/providers/google/cloud/transfers/test_mssql_to_gcs.py

@@ -53,7 +53,7 @@ SCHEMA_JSON = [
 ]
 
 
-@unittest.skipIf(PY38, "Mssql package not avaible when Python >= 3.8.")
+@unittest.skipIf(PY38, "Mssql package not available when Python >= 3.8.")
 class TestMsSqlToGoogleCloudStorageOperator(unittest.TestCase):
 
     def test_init(self):

tests/providers/microsoft/mssql/operators/test_mssql.py

@@ -33,7 +33,7 @@ PYMSSQL_CONN = Connection(conn_id='test-pymssql', conn_type='anything', )
 
 
 class TestMsSqlOperator:
-    @unittest.skipIf(PY38, "Mssql package not avaible when Python >= 3.8.")
+    @unittest.skipIf(PY38, "Mssql package not available when Python >= 3.8.")
     @mock.patch('airflow.hooks.base_hook.BaseHook.get_connection')
     def test_get_hook(self, get_connection):
         """

tests/test_core_to_contrib.py

@@ -51,7 +51,7 @@ class TestMovingCoreToContrib(TestCase):
         py_38 = sys.version_info >= (3, 8)
         if py_38:
             if "mssql" in path_a or "mssql" in path_b:
-                raise self.skipTest("Mssql package not avaible when Python >= 3.8.")
+                raise self.skipTest("Mssql package not available when Python >= 3.8.")
 
     @staticmethod
     def get_class_from_path(path_to_class, parent=False):