Add 2022 releases to the mkdocs nav

Author: superstructor

mkdocs.yml

@@ -95,6 +95,7 @@ nav:
     - Builtin Effects: api-builtin-effects.md
     - re-frame.core: api-re-frame.core.md
   - Releases:
+    - 2022: releases/2022.md
     - 2021: releases/2021.md
     - 2020: releases/2020.md
     - 2019: releases/2019.md