Fix typo in indentation

Author: JulienPeloton

docs/_data/navigation.yml

@@ -5,7 +5,7 @@ main:
   - title: "About"
     url: /about/
   - title: "AstroLab Software"
-     url: https://astrolabsoftware.github.io/
+    url: https://astrolabsoftware.github.io/
   - title: "Fork me!"
     url: https://github.com/astrolabsoftware/spark3D
   # - title: "Sample Posts"