Revert "Fails for unrelated reasons"

This reverts commit 3a4e14d.

Author: vmcj

.github/workflows/autoconf-check.yml

@@ -22,8 +22,8 @@ jobs:
         include:
           - os: debian
             version: stable
-          #- os: debian
-          #  version: testing
+          - os: debian
+            version: testing
     runs-on: ubuntu-latest
     env:
       DEBIAN_FRONTEND: noninteractive