package/python-cheetah: switch SITE to https

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/python-cheetah/python-cheetah.mk

@@ -6,7 +6,7 @@
 
 PYTHON_CHEETAH_VERSION = 2.4.4
 PYTHON_CHEETAH_SOURCE = Cheetah-$(PYTHON_CHEETAH_VERSION).tar.gz
-PYTHON_CHEETAH_SITE = http://pypi.python.org/packages/source/C/Cheetah
+PYTHON_CHEETAH_SITE = https://pypi.python.org/packages/source/C/Cheetah
 PYTHON_CHEETAH_LICENSE = MIT
 PYTHON_CHEETAH_SETUP_TYPE = setuptools