chore: use env variable

Author: ovr

.github/workflows/push.yml

@@ -305,7 +305,8 @@ jobs:
     timeout-minutes: 60
     name: Build Linux Native backend for Dev image
     container:
-      image: cubejs/rust-cross:x86_64-unknown-linux-gnu-15082024-python-${{ env.PYTHON_VERSION_CURRENT }}
+      # Don't forget to align with PYTHON_VERSION_CURRENT
+      image: cubejs/rust-cross:x86_64-unknown-linux-gnu-15082024-python-3.11
 
     steps:
       - name: Checkout