Fix typo.

Author: DmitryLukyanov

src/MongoDB.Driver.Core/Core/Encryption/EncryptedCollectionHelper.cs

@@ -95,7 +95,7 @@ public static IEnumerable<BsonDocument> IterateEmptyKeyIds(CollectionNamespace c
             }
         }
 
-        public static void ModifyEndryptedFields(BsonDocument fieldDocument, Guid dataKey)
+        public static void ModifyEncryptedFields(BsonDocument fieldDocument, Guid dataKey)
         {
             fieldDocument["keyId"] = new BsonBinaryData(dataKey, GuidRepresentation.Standard);
         }

src/MongoDB.Driver/Encryption/ClientEncryption.cs

@@ -93,7 +93,7 @@ public Task<BsonDocument> AddAlternateKeyNameAsync(Guid id, string alternateKeyN
             foreach (var fieldDocument in EncryptedCollectionHelper.IterateEmptyKeyIds(collectionNamespace, effectiveEncryptedFields))
             {
                 var dataKey = CreateDataKey(kmsProvider, dataKeyOptions, cancellationToken);
-                EncryptedCollectionHelper.ModifyEndryptedFields(fieldDocument, dataKey);
+                EncryptedCollectionHelper.ModifyEncryptedFields(fieldDocument, dataKey);
             }
 
             var database = _libMongoCryptController.KeyVaultClient.GetDatabase(collectionNamespace.DatabaseNamespace.DatabaseName);
@@ -122,7 +122,7 @@ public Task<BsonDocument> AddAlternateKeyNameAsync(Guid id, string alternateKeyN
             foreach (var fieldDocument in EncryptedCollectionHelper.IterateEmptyKeyIds(collectionNamespace, effectiveEncryptedFields))
             {
                 var dataKey = await CreateDataKeyAsync(kmsProvider, dataKeyOptions, cancellationToken).ConfigureAwait(false);
-                EncryptedCollectionHelper.ModifyEndryptedFields(fieldDocument, dataKey);
+                EncryptedCollectionHelper.ModifyEncryptedFields(fieldDocument, dataKey);
             }
 
             var database = _libMongoCryptController.KeyVaultClient.GetDatabase(collectionNamespace.DatabaseNamespace.DatabaseName);