fix(ci): always run deps.get to ensure dependencies are current

Issue: Credo failed with 'lock mismatch' errors because deps.get was
skipped when cache hit, but dependencies were out of date

Fix: Remove cache-hit conditional from deps.get step
- mix deps.get is fast when deps are already downloaded
- Ensures mix.lock is always respected
- Prevents dependency mismatch errors in quality checks

.forgejo/workflows/build.yaml

@@ -86,7 +86,6 @@ jobs:
             ${{ runner.os }}-mix-build-
 
       - name: Install dependencies
-        if: steps.deps-cache.outputs.cache-hit != 'true'
         run: mix deps.get
 
       - name: Compile dependencies