test with == instead of @

.github/workflows/tests.yml

@@ -41,7 +41,7 @@ jobs:
             poetry source add torch-cpu --priority=explicit --no-interaction https://download.pytorch.org/whl/cpu
             torch_version=$(poetry show torch --no-ansi | grep 'version' | awk '{print $3}')
             echo "torch@$torch_version@@"
-            poetry add --lock --no-interaction --source torch-cpu "torch@2.0.1"
+            poetry add --lock --no-interaction --source torch-cpu "torch==2.0.1"
             echo "done"
             echo $(poetry show torchvision --no-ansi | grep 'version')
             torchvision_version=$(poetry show torchvision --no-ansi | grep 'version' | awk '{print $3}')