Make readme.yml use Python 3.10 (#30)

Author: sarahmish

.github/workflows/readme.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.8]
+        python-version: ['3.10']
         os: [ubuntu-latest]
     steps:
     - uses: actions/checkout@v1