update python versions for github actions (#324)

Summary:
Pull Request resolved: #324

Updating python versions for github actions to be in line with latest botorch/ax versions

Reviewed By: tymmsc

Differential Revision: D51985484

fbshipit-source-id: 56e587892ed7bc24f8e7b60a23b3ba0f2a7cde98

.github/workflows/build-lint-test.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v2
         with:
-          python-version: "3.10"
+          python-version: "3.11"
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -36,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.8", "3.10"]
+        python-version: ["3.9", "3.11"]
 
     steps:
     - uses: actions/checkout@v2