External Version bump for new version string "3.13"

roles/netbootxyz/defaults/main.yml

@@ -104,8 +104,8 @@ releases:
     mirror: http://dl-cdn.alpinelinux.org
     name: Alpine Linux
     versions:
-    - code_name: v3.12
-      name: '3.12'
+    - code_name: v3.13
+      name: '3.13'
     - code_name: edge
       name: Edge (development)
   anarchy: