cleanup last mention of ubuntu-20.04

diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index f83117dd5622b815ea958c0a60c49a63f389c92c..5107a81ea89041f6c56db0427c186526041ee3f2 100644 (file)
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -15,8 +15,8 @@ jobs:
       matrix:
         # First we test all OSes in the default configuration.
         target:
-          - ubuntu-20.04
           - ubuntu-22.04
+          - ubuntu-latest
           - ubuntu-22.04-arm
           - ubuntu-24.04-arm
           - macos-13