Update build.yml

Author: jsta

.github/workflows/build.yml

@@ -32,7 +32,7 @@ jobs:
           conda env list
           conda info
           conda list
-          conda install -c conda-forge pip
+          conda env update --file environment.yml
           pip install pytest pytest-timeout pytest-cov coveralls coverage
           pip install --upgrade -e .
           coverage run -m pytest --cov-config=.coveragerc --cov=rivgraph/
@@ -94,4 +94,4 @@ jobs:
   #         pip install pytest pytest-timeout pytest-cov coveralls
   #         pip install --upgrade -e .
   #         python -m pytest --cov-config=.coveragerc --cov=rivgraph/
-  #         conda list
+  #         conda list