💚 remove harden runner action from macOS, Windows, and container actions

Author: nlohmann

.github/workflows/ubuntu.yml

@@ -112,15 +112,11 @@ jobs:
 
   ci_cmake_options:
     runs-on: ubuntu-latest
+    container: ubuntu:focal
     strategy:
       matrix:
         target: [ci_cmake_flags, ci_test_diagnostics, ci_test_noexceptions, ci_test_noimplicitconversions, ci_test_legacycomparison, ci_test_noglobaludls]
     steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@0080882f6c36860b6ba35c610c98ce87d4e2f26f # v2.10.2
-        with:
-          egress-policy: audit
-
       - name: Install build-essential
         run: apt-get update ; apt-get install -y build-essential unzip wget git
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2