fix build

.github/workflows/python-package.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
-        pydantic-version: ["<2", ">=2"]
+        pydantic-version: ["pydantic<2", "pydantic>=2"]
 
     steps:
     - uses: actions/checkout@v3
@@ -40,7 +40,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         python -m pip install -e .
-        python -m pip install pydantic${{ matrix.pydantic-version }}
+        python -m pip install "${{ matrix.pydantic-version }}"
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Test
       run: |