Fix pre_merge action (#4609)

Author: ivanzati

.ci/docker/Dockerfile

@@ -20,6 +20,7 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
         unzip \
         git \
         cron \
+        build-essential \
     && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 

.github/workflows/pre_merge.yaml

@@ -104,8 +104,6 @@ jobs:
         uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5.3.0
         with:
           python-version: "3.12"
-      - name: Install build tools
-        run: apt-get update && sudo apt-get install -y build-essential
       - name: Install tox
         run: |
           pip install '.[dev]'