package/python-flask: update homepage URL

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Reviewed-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 3572176dcdd7b653a1948fc3fe2b672b2fa55f99)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-flask/Config.in

@@ -13,4 +13,4 @@ config BR2_PACKAGE_PYTHON_FLASK
 	  Flask is a microframework for Python based on Werkzeug,
 	  Jinja 2 and good intentions.
 
-	  http://flask.pocoo.org/
+	  https://palletsprojects.com/p/flask