Fix menu identifiers

Signed-off-by: Ian Maddaus <ian.maddaus@progress.com>

Author: IanMadd

docs-chef-io/content/habitat/builder/on_prem/install/_index.md

@@ -4,7 +4,7 @@ title = "Chef Habitat On-Prem Builder install overview"
 [menu]
   [menu.habitat]
     title = "Overview"
-    identifier = "habitat/builder/on-prem/install/install/overview"
+    identifier = "habitat/builder/on-prem/install/overview"
     parent = "habitat/builder/on-prem/install"
     weight = 10
 +++

docs-chef-io/content/habitat/builder/on_prem/install/system_requirements.md

@@ -4,7 +4,7 @@ title = "Habitat Builder system requirements"
 [menu]
   [menu.habitat]
     title = "System requirements"
-    identifier = "habitat/builder/on-prem/install/install/system requirements"
+    identifier = "habitat/builder/on-prem/install/system requirements"
     parent = "habitat/builder/on-prem/install"
     weight = 20
 +++