WIP: another attempt to make GH Actions work.

Author: mcepl

.github/workflows/main.yml .github/workflows/build.yml.github/workflows/main.yml renamed to .github/workflows/build.yml

@@ -2,9 +2,11 @@ name: Build and Test
 
 on:
   push:
-    branches: [ master, opensuse ]
+    branches:
+        - 'opensuse_3.6'
   pull_request:
-    branches: [ master, opensuse ]
+    branches:
+        - 'opensuse_3.6'
 
 jobs:
   build_and_test:
@@ -40,7 +42,7 @@ jobs:
               xvfb-run
               xz-devel
               zlib-devel
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - run: ./configure --with-pydebug
       - run: make -j
       - run: ./python -m test -j