Add grandparent to 2nd level docs

Author: m-houston

docs/architecture/physical/initial_account_structure_for_new_architecture.md

@@ -1,7 +1,8 @@
 ---
 layout: default
-title:  Initial account structure for new architecture
+title: Initial account structure for new architecture
 parent: Physical View
+grand_parent: Architecture
 ---
 
 ## Initial account structure for new architecture

docs/architecture/physical/sub-domains_and_bounded_contexts.md

@@ -1,7 +1,8 @@
 ---
 layout: default
-title:  Sub-domains and bounded contexts
+title: Sub-domains and bounded contexts
 parent: Physical View
+grand_parent: Architecture
 ---
 
 ## Sub-domains and bounded contexts