Update fluxdataqaqc_tests.yml for flake issue

.github/workflows/fluxdataqaqc_tests.yml

@@ -18,6 +18,7 @@ jobs:
         $CONDA/bin/conda env update --file environment.yml --name base
     - name: Lint with flake8
       run: |
+        $CONDA/bin/conda install conda-libmamba-solver
         $CONDA/bin/conda install flake8
         # stop the build if there are Python syntax errors or undefined names
         $CONDA/bin/flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --builtins='Path'