Flask: add Josef as the maintainer of this package

It seems that Turris guys is using this package in the Turris OS, where
it is used for reForis (simple, basic UI for users)

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
[replace Daniel as maintainer, add commit message]
Signed-off-by: Josef Schlehofer <josef.schlehofer@nic.cz>
(cherry picked from commit 934a7e22cd)

lang/python/Flask/Makefile

@@ -11,7 +11,7 @@ PKG_RELEASE:=1
 PYPI_NAME:=$(PKG_NAME)
 PKG_HASH:=7b2fb8e934ddd50731893bdcdb00fc8c0315916f9fcd50d22c7cc1a95ab634e2
 
-PKG_MAINTAINER:=Daniel Golle <daniel@makrotopia.org>
+PKG_MAINTAINER:=Josef Schlehofer <josef.schlehofer@nic.cz>
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE.rst
 PKG_CPE_ID:=cpe:/a:palletsprojects:flask