Merge pull request #41 from gracezhengge/patch-17

Update Spindle_Index.md

Author: Lockeysama

source/docs/Sleep Reports/Spindle_Index.md

@@ -1,5 +1,5 @@
 ---
-slug: /Sleep-Report/Spindle-Index
+slug: /Sleep-Reports/Spindle-Index
 sidebar_label: Spindle Index
 sidebar_position: 9
 hide_title: true