stack/slapos: version up ZConfig 3.6.2

2.x series do not have python3 support

keep 2.9.3 in ERP5 for now, because on master branch we are still
expecting version 2 (zope4py2 branch on the other hand needs version 3)

stack/erp5/buildout.cfg

@@ -868,3 +868,4 @@ jsonpointer = 2.2
 pandas = 0.19.2
 numpy = 1.13.1
 scipy = 0.19.0
+ZConfig = 2.9.3

stack/slapos.cfg

@@ -250,7 +250,7 @@ Werkzeug = 2.0.2
 wheel = 0.35.1:whl
 xml-marshaller = 1.0.2
 zc.lockfile = 1.4
-ZConfig = 2.9.3
+ZConfig = 3.6.1
 zdaemon = 4.2.0
 zipp = 1.2.0:whl
 zodburi = 2.5.0