Update markdown-gridded.yml

Swap develop branch for 675_scipy_integrate_cumtrapz_update branch and fix typo to step name

Author: MagdaJuarez

.github/workflows/markdown-gridded.yml

@@ -18,10 +18,10 @@ jobs:
         uses: actions/checkout@v4
         with:
           repository: British-Oceanographic-Data-Centre/COAsT
-          ref: develop
+          ref: 675_scipy_integrate_cumtrapz_update
           path: external
 
-      - name: Prepare environement
+      - name: Prepare environment
         uses: conda-incubator/setup-miniconda@v2
         with:
           activate-environment: coast