Test updating deps in CI

Author: tiagoefmoraes

.github/workflows/ci.yml

@@ -24,6 +24,7 @@ jobs:
             otp: '26.0'
             check_formatted: true
             warnings_as_errors: true
+            update_deps: true
     env:
       MIX_ENV: test
     steps:
@@ -35,6 +36,9 @@ jobs:
       - name: Use old lock file
         if: matrix.old_deps
         run: mv mix.lock.old mix.lock
+      - name: Update deps
+        if: matrix.update_deps
+        run: mix deps.update --all
       - name: Deps and _build cache
         uses: actions/cache@v4
         id: deps-cache