ci: Drop default for inputs.command in run-in-docker-action

This change decreases coupling.

.github/actions/run-in-docker-action/action.yml

@@ -10,8 +10,7 @@ inputs:
     default: ${{ runner.arch }}
   command:
     description: 'A command to run in a container'
-    required: false
-    default: ./ci/ci.sh
+    required: true
 runs:
   using: "composite"
   steps:

.github/workflows/ci.yml

@@ -117,6 +117,7 @@ jobs:
         uses: ./.github/actions/run-in-docker-action
         with:
           dockerfile: ./ci/linux-debian.Dockerfile
+          command: ./ci/ci.sh
 
       - &PRINT_LOGS
         name: Print logs