docs(va): use /visual-analytics/ for the embed page

The route is hyphenated like the other multi-word docs paths (dcc-*, pre-edit-hook).
The page has not been published under /visualanalytics/, so only the embed-va
redirect map needs to point at the final path.

mkdocs.yml

@@ -73,7 +73,7 @@ nav:
     - Selectboxes: dcc-selectbox.md
     - Tables: dcc-tables.md
     - Validations: dcc-validations.md
-    - Visual Analytics: visualanalytics.md
+    - Visual Analytics: visual-analytics.md
 - Macros: macros.md
 - Installation:
     - System Requirements: dci-requirements.md
@@ -113,7 +113,7 @@ plugins:
       redirect_maps:
           'dci-evaluation.md': 'dci-deploysas9.md'
           'dcu-fileupload.md': 'files.md'
-          'embed-va.md': 'visualanalytics.md'
+          'embed-va.md': 'visual-analytics.md'
 
 # Repository
 repo_name: 'dc/docs.datacontroller.io'