update github actions runner version

Author: adamcantor22

.github/workflows/tests.yml

@@ -5,7 +5,7 @@ on: [push
 
 jobs:
   run-tests-complex:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     defaults:
       run:
         shell: bash -l {0}
@@ -74,7 +74,7 @@ jobs:
             token: ${{ secrets.CODECOV_TOKEN }}
 
   run-tests-simple:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python 3.9