Use the latest checkout version

sasa1977 · sasa1977 · commit 0c8e67a636d3 · 2025-07-15T08:52:39.000+02:00
diff --git a/.github/workflows/boundary.yaml b/.github/workflows/boundary.yaml
@@ -10,7 +10,7 @@ jobs:
       CACHE_VERSION: v2
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: erlef/setup-elixir@v1
         with:
