Update unit_test_contents.yml

Add pip command to install COAsT package

Author: MagdaJuarez

.github/workflows/unit_test_contents.yml

@@ -19,8 +19,9 @@ jobs:
         run: |
           CONDA_BASE=$(conda info --base)
           source "${CONDA_BASE}/etc/profile.d/conda.sh"
-          conda env update --prune --file environment.yml 
-          conda activate coast 
+          conda env update --prune --file environment.yml
+          conda activate coast
+          pip install .
           mkdir -p example_files
           sudo apt-get update
           sudo apt-get install -y libgeos-dev