[hotfix] v4.0 branch run ci for 2.0-SNAPSHOT

Author: reswqa

.github/workflows/push_pr.yml

@@ -28,7 +28,7 @@ jobs:
   compile_and_test:
     strategy:
       matrix:
-        flink: [ 2.1-SNAPSHOT ]
+        flink: [ 2.0-SNAPSHOT ]
         jdk: [ '11', '17, 21' ]
     uses: apache/flink-connector-shared-utils/.github/workflows/ci.yml@ci_utils
     with: