upgrade apptainer version in CI

Author: svandenhaute

.github/workflows/run_pytest.yaml

@@ -7,18 +7,11 @@ on:
     branches: [ main ]
 jobs:
   test-py310:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     steps:
-      - name: Configure user namespaces
-        run: |
-          sudo sysctl -w kernel.unprivileged_userns_clone=1
-          sudo mkdir -p /etc/subuid /etc/subgid
-          sudo touch /etc/subuid /etc/subgid
-          sudo usermod --add-subuids 10000-75535 runner
-          sudo usermod --add-subgids 10000-75535 runner
       - uses: eWaterCycle/setup-apptainer@v2
         with:
-          apptainer-version: 1.3.0
+          apptainer-version: 1.3.6
       - uses: mamba-org/setup-micromamba@v1
         with:
           micromamba-version: '2.0.5-0'