swap to ubuntu latest

Author: jacomago

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       - uses: pre-commit/[email protected]
   build:
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-20.04 # 3.6 is not supported by Ubuntu 22.04
     strategy:
       fail-fast: false
       matrix:
@@ -32,7 +32,7 @@ jobs:
         python -m pip install .
   test:
 
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix: