Use Python 3.10 for github actions.

HA OS has used 3.10 since 2022.07.

3.11.1 was released yesterday, so I guess they will be dropping
support for 3.9 soon (maybe as soon as the 2023.2 release)

.github/workflows/linting.yml

@@ -11,7 +11,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v2
         with:
-          python-version: 3.9
+          python-version: 3.10
 
       - name: Install dependencies
         run: |

.github/workflows/tests.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9]
+        python-version: [3.10]
 
     steps:
       - uses: actions/checkout@v2