Run tests on ubuntu 20.04 and 22.04 with ruby 3.1

Ubuntu 22.04 actually uses ruby 3.0 but ruby/setup-ruby currently
only supports ruby 3.1 there so this is the best we can do.

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 504bb94ab9afa8f1593759a7609cfa5388fdc3a4..2ee32c44974fcb61bc99e78113055c533c0cbf9a 100644 (file)
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -10,8 +10,8 @@ jobs:
     name: Ubuntu ${{ matrix.ubuntu }}, Ruby ${{ matrix.ruby }}
     strategy:
       matrix:
-        ubuntu: [20.04]
-        ruby: [2.7, 3.0]
+        ubuntu: [20.04, 22.04]
+        ruby: [2.7, 3.0, 3.1]
     runs-on: ubuntu-${{ matrix.ubuntu }}
     env:
       RAILS_ENV: test