fixing TOC

Author: vsoch

docs/_data/toc.yml

@@ -7,23 +7,12 @@
   - title: "Python API"
     url: "/singularity-cli/commands"
     slug: commands
-    sections:
-      - title: Shell
-        slug: shell
-      - title: Build
-        slug: build
-      - title: Pull
-        slug: pull
-      - title: Apps
-        slug: apps
-      - title: Inspect
-        slug: inspect
-      - title: Run
-        slug: run
-      - title: Execute
-        slug: execute
-      - title: Help
-        slug: help
+  - title: "Image Commands"
+    url: "/singularity-cli/commands-images"
+    slug: images
+  - title: "Instance Commands"
+    url: "/singularity-cli/commands-instances"
+    slug: instances
   - title: "Python API Docstring"
     url: "https://singularityhub.github.io/singularity-cli/api/source/spython.main.html"
     slug: docstring