Remove 3.6 and add 3.11 for CI tests

- python 3.6 (x64) was not found for Ubuntu 22.04

Signed-off-by: Timothy Lee <ctiml@infuseai.io>

Author: ctiml

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, "3.10"]
+        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v2