ci: Fix workflow

Author: dennisklein

.github/workflows/build.yml

@@ -10,7 +10,9 @@ jobs:
   build:
     name: Build with Slurm ${{ matrix.slurm }}
     runs-on: ubuntu-latest
-    container: ${{ matrix.container }}
+    container:
+      image: ${{ matrix.container }}
+      options: --user root
 
     env:
       SOURCEDIR: ${{ github.workspace }}
@@ -34,7 +36,7 @@ jobs:
 
     steps:
       - name: Install dependencies
-        run: sudo apt-get install -y cmake ninja-build libslurm-dev
+        run: apt-get install -y cmake ninja-build libslurm-dev
 
       - uses: actions/checkout@v4