Trying to fix test workflows

Author: jmwright

.github/workflows/test_freecad.yml

@@ -16,6 +16,7 @@ jobs:
           source /usr/share/miniconda/bin/activate
           conda activate freecad
           python -m pip install --upgrade pip
+          unset CONDA_PREFIX_1
           pip install -e .
           pip install -e .[dev]
           python -m pytest -v tests/test_freecad.py

.github/workflows/tests.yml

@@ -12,12 +12,12 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.10"]
-        os: [ubuntu-latest, windows-latest]  # , macos-latest
+        os: [ubuntu-20.04, windows-latest]  # , macos-latest
     runs-on: ${{ matrix.os }}
     steps:
       - name: Install Dependencies (Linux)
         run: sudo apt-get update && sudo apt install -y libgl1-mesa-glx
-        if: matrix.os == 'ubuntu-latest'
+        if: matrix.os == 'ubuntu-20.04'
       - uses: actions/checkout@v2
       - name: Install CadQuery and pytest
         run: |