toc: make some titles short in navigation menu

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

_data/toc.yaml

@@ -154,27 +154,27 @@ guides:
       - sectiontitle: Use trusted images
         section:
         - path: /engine/security/trust/
-          title: Content trust in Docker
+          title: Overview
         - path: /engine/security/trust/trust_automation/
-          title: Automation with content trust
+          title: Automation
         - path: /engine/security/trust/trust_delegation/
-          title: Delegations for content trust
+          title: Delegations
         - path: /engine/security/trust/deploying_notary/
-          title: Deploying Notary
+          title: Deploy Notary
         - path: /engine/security/trust/trust_key_mng/
-          title: Manage keys for content trust
+          title: Manage content trust keys
         - path: /engine/security/trust/trust_sandbox/
           title: Play in a content trust sandbox
       - path: /engine/security/antivirus/
-        title: Antivirus software and Docker
+        title: Antivirus software
       - path: /engine/security/apparmor/
-        title: AppArmor security profiles for Docker
+        title: AppArmor security profiles
       - path: /engine/security/seccomp/
-        title: Seccomp security profiles for Docker
+        title: Seccomp security profiles
       - path: /engine/security/userns-remap/
         title: Isolate containers with a user namespace
       - path: /engine/security/rootless/
-        title: Run the Docker daemon as a non-root user (Rootless mode)
+        title: Rootless mode
     - sectiontitle: Scale your app
       section:
       - path: /engine/swarm/