Fix remaining forntmatter slug in index.mdx

Author: RebeccaTamachiro

src/content/docs/1.1.1.1/additional-options/index.mdx

@@ -5,7 +5,7 @@ sidebar:
   order: 5
   group:
     hideIndex: true
-slug: 1.1.1.1/other-ways-to-use-1.1.1.1
+slug: 1.1.1.1/additional-options
 
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