Remove --system in uv pip install commands in ci.yml

Author: nathanjmcdougall

.github/workflows/ci.yml

@@ -16,8 +16,8 @@ jobs:
 
       - name: Setup dependencies
         run: |
-          uv pip install --system -r ./.requirements/${{ matrix.python-version }}-${{ runner.os }}.txt
-          uv pip install --system pytest pytest-md pytest-emoji
+          uv pip install -r ./.requirements/${{ matrix.python-version }}-${{ runner.os }}.txt
+          uv pip install pytest pytest-md pytest-emoji
 
       - name: Run pytest
         uses: pavelzw/pytest-action@510c5e90c360a185039bea56ce8b3e7e51a16507 # v2.2.0