workstation: bump to python 3.9

manifests/workstation.pp

@@ -158,16 +158,16 @@ class freebsd::workstation inherits freebsd::base {
       'protobuf',
       'pv',
       'pwgen',
-      'py38-bear',
-      'py38-i3ipc',
-      'py38-ipython',
-      'py38-khal',
-      'py38-matplotlib',
-      'py38-pip',
-      'py38-ranger',
-      'py38-scipy',
-      'py38-wheel',
-      'py38-game',
+      'py39-bear',
+      'py39-i3ipc',
+      'py39-ipython',
+      'py39-khal',
+      'py39-matplotlib',
+      'py39-pip',
+      'py39-ranger',
+      'py39-scipy',
+      'py39-wheel',
+      'py39-game',
       'python3',
       'qemu',
       'qtcreator',