Run test on ubuntu 24.04 (#37)

Author: unasuke

.github/workflows/test.yml

@@ -9,7 +9,7 @@ on:
     - cron: "0 0 * * 6" # At 00:00 on Saturday
 jobs:
   test:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-24.04
     strategy:
       matrix:
         ruby: ["4.0", "3.4", "3.3", "3.2", "3.1", "3.0", "2.7", "2.6"]