Add python3 build dependency in control template

branding/templates/debian/control-template

@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: LEAP Encryption Access Project <debian@leap.se>
 Build-Depends: debhelper-compat (= 12), golang (>= 1.22), make (>=3.80), pkg-config, g++ (>= 4:4.6.3), git,
         libqt6svg6-dev, qt6-tools-dev, qt6-tools-dev-tools, qt6-base-dev, libqt6qml6, qt6-declarative-dev,
-        dh-golang, libgl-dev, qt6-declarative-dev-tools, qt6-l10n-tools
+        dh-golang, libgl-dev, qt6-declarative-dev-tools, qt6-l10n-tools, python3
 Standards-Version: 4.4.1
 Homepage: https://0xacab.org/leap/bitmask-vpn