fix indentation

Author: jornbr

.github/workflows/gotm.yml

@@ -33,6 +33,6 @@ jobs:
         with:
           path: cases
           repository: gotm-model/cases
-           ref: v6.0
+          ref: v6.0
       - name: Build and run all test cases
         run: python3 cases/scripts/run_all.py --show_logs --gotm_base=gotm --exclude plume --compiler=gfortran-${{ matrix.version }} -DGOTM_USE_STIM=ON -DGOTM_USE_SEAGRASS=ON -DGOTM_USE_NetCDF=OFF ${{ matrix.cmake_args }}