[hotfix] Make sure that main is tested against SNAPSHOT versions

Author: MartijnVisser

.github/workflows/push_pr.yml

@@ -25,7 +25,7 @@ jobs:
   compile_and_test:
     strategy:
       matrix:
-        flink: [1.17.0, 1.18-SNAPSHOT]
+        flink: [1.17-SNAPSHOT, 1.18-SNAPSHOT]
     uses: apache/flink-connector-shared-utils/.github/workflows/ci.yml@ci_utils
     with:
       flink_version: ${{ matrix.flink }}