fix syntax

Author: rouilj

.github/workflows/ci-test.yml

@@ -199,7 +199,7 @@ jobs:
           python ./setup.py build_doc
 
       - name: test if command
-        if: {{ matrix.python_version == "3.10" && matrix.os == "ubuntu-latest" }}
+        if: matrix.python_version == "3.10" && matrix.os == "ubuntu-latest"
         run: |
           env
           echo "{{ matrix.python_version }}"