docs: add TOC

kenjis · kenjis · commit df6f0414c228 · 2022-07-26T10:28:48.000+09:00
diff --git a/user_guide_src/source/installation/troubleshooting.rst b/user_guide_src/source/installation/troubleshooting.rst
@@ -4,6 +4,10 @@ Troubleshooting
 
 Here are some common installation problems, and suggested workarounds.
 
+.. contents::
+    :local:
+    :depth: 2
+
 How do I know if my install is working?
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