ci: don't skip dialyzer plt build with cache hit (astarte-platform#1524)

dialyzer is smart enough to avoid rebuilding cache for already built
modules

fixes issue with dialyzer step failing for local dependencies because
they didn't get rebuilt

Signed-off-by: Francesco Noacco <francesco.noacco@secomind.com>

Author: noaccOS

.github/workflows/astarte-apps-build-workflow.yaml

@@ -54,7 +54,6 @@ jobs:
       run: mix deps.get
     - name: Create PLTs dir
       working-directory: ./apps/${{ inputs.app }}
-      if: ${{ steps.plt_cache.outputs.cache-hit != 'true' }}
       run: mkdir -p dialyzer_cache && mix dialyzer --plt
     - name: Run dialyzer
       working-directory: ./apps/${{ inputs.app }}