chore: Bump Elixir version in CD

Docs cant build properly with such an old elixir version, let's use a more recent one

Code still works on Elixir 12, this is just for our docs

Author: rafaeelaudibert

.github/workflows/cd.yml

@@ -26,8 +26,8 @@ jobs:
       - name: Set up Elixir
         uses: erlef/setup-beam@v1
         with:
-          elixir-version: 1.12.3
-          otp-version: 24.3
+          elixir-version: 1.16.3
+          otp-version: 26.2
 
       - name: Detect version bump type
         id: bump-type