fix: manager typo (#1995)

Signed-off-by: Gaius <gaius.qi@gmail.com>

client/config/dynconfig_manager.go

@@ -143,7 +143,7 @@ func (d *dynconfigManager) GetSchedulers() ([]*managerv1.Scheduler, error) {
 	}
 
 	if data.Schedulers == nil {
-		return nil, errors.New("invalid scheudlers")
+		return nil, errors.New("invalid schedulers")
 	}
 
 	if len(data.Schedulers) == 0 {

client/config/dynconfig_manager_test.go

@@ -342,7 +342,7 @@ func TestDynconfigGetResolveSchedulerAddrs_ManagerSourceType(t *testing.T) {
 			expect: func(t *testing.T, dynconfig Dynconfig, data *DynconfigData) {
 				assert := assert.New(t)
 				_, err := dynconfig.GetResolveSchedulerAddrs()
-				assert.EqualError(err, "invalid scheudlers")
+				assert.EqualError(err, "invalid schedulers")
 			},
 		},
 	}