package/qt5: fix check-package warnings

Fixes:

https://gitlab.com/buildroot.org/buildroot/-/jobs/622129163

Signed-off-by: Pierre-Jean Texier <pjtexier@koncepto.io>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/qt5/qt5.mk

@@ -21,7 +21,7 @@ endef
 
 ifeq ($(BR2_PER_PACKAGE_DIRECTORIES),y)
 define QT5_QT_CONF_FIXUP
-        $(QT5_INSTALL_QT_CONF)
+	$(QT5_INSTALL_QT_CONF)
 endef
 endif