doc: fix github urls to use the new org

Signed-off-by: Fabio Utzig <fabio.utzig@nordicsemi.no>
diff --git a/scripts/setup.py b/scripts/setup.py
index bf35d9f..b567a9a 100644
--- a/scripts/setup.py
+++ b/scripts/setup.py
@@ -8,7 +8,7 @@
     author_email="mcuboot@groups.io",
     description=("MCUboot's image signing and key management"),
     license="Apache Software License",
-    url="http://github.com/JuulLabs-OSS/mcuboot",
+    url="http://github.com/mcu-tools/mcuboot",
     packages=setuptools.find_packages(),
     python_requires='>=3.6',
     install_requires=[