[CI] Explicitly specify Ubuntu 18.04 in GitHub Actions config (#3292)

Alexander Batashev · web-flow · commit 2a7a1496e306 · 2021-03-03T18:26:17.000+03:00
diff --git a/.github/workflows/linux_post_commit.yml b/.github/workflows/linux_post_commit.yml
@@ -6,7 +6,7 @@ on:
       - sycl
 jobs:
    check:
-     runs-on: ubuntu-latest
+     runs-on: ubuntu-18.04
      strategy:
        fail-fast: false
        matrix:
