Merge pull request #269 from chobits/for_pull_request

trigger test to openresty 1.21.4.2 RC1

Author: chobits

.github/workflows/test_openresty.yml

@@ -10,7 +10,7 @@ jobs:
   test-openresty:
     strategy:
        matrix:
-         version: [1.21.4.1]
+         version: [1.21.4.2rc1]
        fail-fast: false
     runs-on: "ubuntu-20.04"